PHP userland backwards compatibility layer that emulates PHP 5.5+ core functions.

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Overview
Comment:Move PHP 4.1-5.0 code out into separate include ext/php50.php.
Timelines: family | ancestors | trunk
Files: files | file ages | folders
SHA1: 4d4222f05d057c13eb7dbc16b14523c0d19d1aff
User & Date: mario 2015-05-07 03:54:53
Context
2015-05-07
03:54
Move PHP 4.1-5.0 code out into separate include ext/php50.php. Leaf check-in: 4d4222f05d user: mario tags: trunk
03:41
Fix runkit json_decode mapping, as reported by Lifeboat Fndt. check-in: 87087bb336 user: mario tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to ext/contrib/input.php.

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<?php
 /**
  * api: php
  * title: Input $_REQUEST wrappers
  * type: interface
  * description: provides sanitization by encapsulating request superglobals against raw access
  * version: 2.6
  * revision: $Id$
  * license: Public Domain
  * depends: php:filter, php >5.0, html_purifier
  * config: <const name="INPUT_DIRECT" type="multi" value="disallow" multi="disallow|raw|log" description="filter method for direct $_REQUEST[var] access" />
  *         <const name="INPUT_QUIET" type="bool" value="0" multi="0=report all|1=no notices|2=no warnings" description="suppress access and behaviour notices" />
  * throws: E_USER_NOTICE, E_USER_WARNING, OutOfBoundsException
  *
  * Using these object wrappers ensures a single entry point and verification
  * spot for all user data. They wrap all superglobals and filter HTTP input
  * through sanitizing methods. For auditing casual and unverified access.
  *
  * Standardly they wrap: $_REQUEST, $_GET, $_POST, $_SERVER, $_COOKIE
  * And provide convenient access to filtered data:
  *   $_GET->int("search_q")                      // method
  *   $_POST->text["commentfield"]                // array syntax
  *   $_REQUEST->text->ascii->strtolower["xyz"]   // filter chains
  *
  * Available filter methods are:
  *   ->int
  *   ->float
  *   ->boolean





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<?php
 /**
  * api: php
  * title: Input $_REQUEST wrappers
  * type: interface
  * description: Encapsulates input variable superglobals for easy sanitization access
  * version: 2.8
  * revision: $Id$
  * license: Public Domain
  * depends: php:filter, php >5.0, html_purifier
  * config: <const name="INPUT_DIRECT" type="multi" value="disallow" multi="disallow|raw|log" description="filter method for direct $_REQUEST[var] access" />
  *         <const name="INPUT_QUIET" type="bool" value="0" multi="0=report all|1=no notices|2=no warnings" description="suppress access and behaviour notices" />
  * throws: E_USER_NOTICE, E_USER_WARNING, OutOfBoundsException
  *
  * Using these object wrappers ensures a single entry point and verification
  * spot for all user data. They wrap all superglobals and filter HTTP input
  * through sanitizing methods. For auditing casual and unverified access.
  *
  * Standardly they wrap: $_REQUEST, $_GET, $_POST, $_SERVER, $_COOKIE
  * And provide convenient access to filtered data:
  *   $_GET->int("page_num")                      // method
  *   $_POST->text["commentfield"]                // array syntax
  *   $_REQUEST->text->ascii->strtolower["xyz"]   // filter chains
  *
  * Available filter methods are:
  *   ->int
  *   ->float
  *   ->boolean
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  *   ->default
  * And most useful methods of the php filter extension.
  *   ->email
  *   ->url ->uri ->http
  *   ->ip
  *   ->ipv4->public
  * PHP string modification functions:
  *   ->strtolower
  *   ->addslashes
  *   ->urlencode
  *   ->strip_tags
  *   ->htmlentities

  * Automatic filter chain handler:
  *   ->array
  * Fetch multiple variables at once:
  *   ->list["var1,key,name"]
  * Process multiple entries as array:
  *   ->multi->http_build_query["id,token"]
  * Possible but should be used very consciously:







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  *   ->default
  * And most useful methods of the php filter extension.
  *   ->email
  *   ->url ->uri ->http
  *   ->ip
  *   ->ipv4->public
  * PHP string modification functions:


  *   ->urlencode
  *   ->strip_tags
  *   ->htmlentities
  *   ->strtolower
  * Automatic filter chain handler:
  *   ->array
  * Fetch multiple variables at once:
  *   ->list["var1,key,name"]
  * Process multiple entries as array:
  *   ->multi->http_build_query["id,token"]
  * Possible but should be used very consciously:
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  * just $_POST() if there are contents. (Use this in lieu of empty() test.)
  * There are also the three functions ->has ->no ->keys() for array lookup.
  *
  * Defining new filters can be done as methods, or since those are picked
  * up too, as plain global functions. It's also possible to assign function
  * aliases or attach closures:
  *   $_POST->_newfilter = function($s) { return modified($s); }
  * Note that the assignment name must have an underscore prefixed.
  *
  * --
  *
  * Input validation of course is no substitute for secure application logic,
  * parameterized sql and proper output encoding. But this methodology is a
  * good base and streamlines input data handling.
  *
  * Filter methods can be bypassed in any number of ways. There's no effort
  * made at prevention here. But it's recommended to simply use ->raw() when
  * needed - not all input can be filtered anyway. This way an audit handler
  * could always attach there - when desired.
  *
  * The goal is not to coerce, but encourage security via API *simplicity*.
  *
  */














/**
 * Handler name for direct $_REQUEST["array"] access.
 *
 *   "raw" = reports with warning,
 *   "disallow" = throws an exception
 */







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  * just $_POST() if there are contents. (Use this in lieu of empty() test.)
  * There are also the three functions ->has ->no ->keys() for array lookup.
  *
  * Defining new filters can be done as methods, or since those are picked
  * up too, as plain global functions. It's also possible to assign function
  * aliases or attach closures:
  *   $_POST->_newfilter = function($s) { return modified($s); }
  * Note that the assigned filter name must have an underscore prefixed.
  *
  * --
  *
  * Input validation of course is no substitute for secure application logic,
  * parameterized sql and proper output encoding. But this methodology is a
  * good base and streamlines input data handling.
  *
  * Filter methods can be bypassed in any number of ways. There's no effort
  * made at prevention here. But it's recommended to simply use ->raw() when
  * needed - not all input can be filtered anyway. This way an audit handler
  * could always attach there - when desired.
  *
  * The goal is not to coerce, but encourage security via API *simplicity*.
  *
  */


/**
 * Project-specific identifiers.
 *
 * Since `input` is an overly generic name, one might wish to wrap it up if
 * there's an identifier conflict. (Remember; namespaces aren't taxonomies.)
 *
 */
#namespace filter;
#use \ArrayObject, \Countable, \Iterator, \OutOfBoundsException;
#use \HTMLPurifier;


/**
 * Handler name for direct $_REQUEST["array"] access.
 *
 *   "raw" = reports with warning,
 *   "disallow" = throws an exception
 */
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     * These methods are usually not to be called directly. Instead use
     * $_GET->filtername["varname"] syntax without preceeding underscore
     * to access variable content.
     *
     * Categories: [e]=escape, [w]=whitelist, [b]=blacklist, [s]=sanitize, [v]=validate
     *
     */


    
    /**

     * [w]

     * Integer.
     *
     */
    function _int($data) {
        return (int)$data;
    }

    /**
     * [w]


     * Float.
     *
     */
    function _float($data) {
        return (float)$data;
    }
    
    /**

     * [w]

     * Alphanumeric strings.
     * (e.g. var names, letters and numbers, may contain international letters)
     *
     */
    function _name($data) {
        return preg_replace("/\W+/u", "", $data);
    }

    /**
     * [w]


     * Identifiers with underscores and dots,
     * like "xvar.1_2.x"
     *
     */
    function _id($data) {
        return preg_replace("#(^[^a-z_]+)|[^\w\d_.]+|([^\w_]$)#i", "", $data);
    }
    
    /**






     * [w]








     * Flow text with whitespace,
     * minimal interpunction allowed.
     *
     */
    function _words($data, $extra="") {
        return preg_replace("/[^\w\d\s,._\-+$extra]+/u", " ", strip_tags($data));
    }

    /**
     * [w]
     * Human-readable text with many special/interpunction characters:
     *  " and ' allowed, but no <, > or \
     *
     */
    function _text($data) {
        return preg_replace("/[^\w\d\s,._\-+?!;:\"\'\/`ยด()*=]+/u", " ", strip_tags($data));
    }
    
    /**
     * Acceptable filename characters.
     *
     * Alphanumerics and dot (but not as first character).
     * You should use `->basename` as primary filter anyway.
     *
     * @t whitelist
     *
     */
    function _filename($data) {
        return preg_replace("/^[.\s]|[^\w._+-]/", "_", $data);
    }
    
    #_datetime($name) { ... }  // as in HTML5
    #_session_id($name) { ... }  // e.g. verify last IP, stale session, user-agent
    #_
    
    /**
     * [b]
     * Filter non-ascii text out.
     * Does not remove control characters. (Similar to FILTER_FLAG_STRIP_HIGH.)
     * 
     */







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     * These methods are usually not to be called directly. Instead use
     * $_GET->filtername["varname"] syntax without preceeding underscore
     * to access variable content.
     *
     * Categories: [e]=escape, [w]=whitelist, [b]=blacklist, [s]=sanitize, [v]=validate
     *
     */


    
    /**
     * @type    cast
     * @sample  22
     *
     * Integer.
     *
     */
    function _int($data) {
        return (int)$data;
    }

    /**
     * @type    cast
     * @sample  3.14159
     *
     * Float.
     *
     */
    function _float($data) {
        return (float)$data;
    }
    
    /**
     * @type    white, strip
     * @sample  "_foo123"
     *
     * Alphanumeric strings.
     * (e.g. var names, letters and numbers, may contain international letters)
     *
     */
    function _name($data) {
        return preg_replace("/\W+/u", "", $data);
    }

    /**
     * @type    white, strip
     * @sample  "xvar.1_2.x"
     *
     * Identifiers with underscores and dots,

     *
     */
    function _id($data) {
        return preg_replace("#(^[^a-z_]+)|[^\w\d_.]+|([^\w_]$)#i", "", $data);
    }

    /**
     * @type    white, strip
     * @sample  "tag-name-123"
     *
     * Alphanumeric strings with dashes. Commonly used for slugs.
     * Consecutive dashes and underscores are compacted.
     *
     */
    function _slug($data) {
        return preg_replace("/[^\w-]+|^[^a-z]+|[^\w]+$|(?<=[-_])[-_]+/", "", strtolower($s));
    }
    
    /**
     * @type    white, strip
     * @sample  "Hello - World. Foo + 3, Bar."
     * 
     * Flow text with whitespace,
     * with minimal interpunction allowed (optional parameter).
     *
     */
    function _words($data, $extra="") {
        return preg_replace("/[^\w\d\s,._\-+$extra]+/u", " ", strip_tags($data));
    }

    /**
     * [w]
     * Human-readable text with many special/interpunction characters:
     *  " and ' allowed, but no <, > or \
     *
     */
    function _text($data) {
        return preg_replace("/[^\w\d\s,._\-+?!;:\"\'\/`ยด()*=#@]+/u", " ", strip_tags($data));
    }
    
    /**
     * Acceptable filename characters.
     *
     * Alphanumerics and dot (but not as first character).
     * You should use `->basename` as primary filter anyway.
     *
     * @t whitelist
     *
     */
    function _filename($data) {
        return preg_replace("/^[.\s]|[^\w._+-]/", "_", $data);
    }
    



    
    /**
     * [b]
     * Filter non-ascii text out.
     * Does not remove control characters. (Similar to FILTER_FLAG_STRIP_HIGH.)
     * 
     */
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                return($result[$match]);
            }
        }
        # cropping
        elseif (strpos($rx, "[^")) {
            return preg_replace($rx, "", $data);
        }




    }
    
    /**
     * [w]
     * Miximum string length.
     *
     */
    function _length($data, $max=65535) {


        return substr($data, 0, $max);





    }
    
    /**
     * [w]
     * Range ensures value is between given minimum and maximum.
     * (Does not convert to integer itself.)
     *







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                return($result[$match]);
            }
        }
        # cropping
        elseif (strpos($rx, "[^")) {
            return preg_replace($rx, "", $data);
        }
        # replacing
        else {
            return preg_replace($rx, $match, $data);
        }
    }
    
    /**
     * [w]
     * Miximum and minimum string length.
     *
     */
    function _length($data, $max=65535, $cut=NULL) {
        // just the length limit
        if (is_null($cut)) {
            return substr($data, 0, $max);
        }
        // require minimum string length, else drop value completely
        else {
            return strlen($data) >= $max ? substr($data, 0, $cut)  : NULL;
        }
    }
    
    /**
     * [w]
     * Range ensures value is between given minimum and maximum.
     * (Does not convert to integer itself.)
     *
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            (?<port> :\d{1,5} )?   # the integer isn't optional if port : colon present (unlike FILTER_VALIDATE_URL)
            (?<path> [/][^?#\s]* )?
            (?<qury> [?][^#\s]* )?
            (?<frgm> [#]\S* )?
        \z~ix", $data, $uu) ? $data : NULL;#(print_r($uu) ? $data : $data)
    }
    
/*
# http://phpcentral.com/208-url-validation-in-php.html

$urlregex = "^(https?|ftp)\:\/\/([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?@)?
[a-z0-9+\$_-]+(\.[a-z0-9+\$_-]+)*(\:[0-9]{2,5})?
(\/([a-z0-9+\$_-]\.?)+)*\/?(\?[a-z+&\$_.-][a-z0-9;:@/&%=+\$_.-]*)?(#[a-z_.-][a-z0-9+\$_.-]*)?\$";
*/

    /**
     * [w] 
     * IP address
     *
     */
    function _ip($data) {
        return filter_var($data, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4|FILTER_FLAG_IPV6) ? $data : NULL;







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            (?<port> :\d{1,5} )?   # the integer isn't optional if port : colon present (unlike FILTER_VALIDATE_URL)
            (?<path> [/][^?#\s]* )?
            (?<qury> [?][^#\s]* )?
            (?<frgm> [#]\S* )?
        \z~ix", $data, $uu) ? $data : NULL;#(print_r($uu) ? $data : $data)
    }
    








    /**
     * [w] 
     * IP address
     *
     */
    function _ip($data) {
        return filter_var($data, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4|FILTER_FLAG_IPV6) ? $data : NULL;
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     * @param $data string
     * @return string
     */
    function _html($data) {

        return htmlspecialchars($data, ENT_QUOTES, "UTF-8", false);
    }















    /**
     * [e]
     * Escape all significant special chars.
     *
     */
    function _escape($data) {







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     * @param $data string
     * @return string
     */
    function _html($data) {

        return htmlspecialchars($data, ENT_QUOTES, "UTF-8", false);
    }

    /**
     * [b]
     * Removes residual and certain HTML tags.
     * WARNING: This is no `strip_tags()` substitute, but purposefully leaves
     * lonesome < angle brackets > alone. Only strips coherent and well-known
     * presentational markup.
     *
     */
    function _strip_markup($data, $with="") {
        return preg_replace("~(<\s*/?\s*(a|b|i|em|strong|sup|sub|ins|del|br|hr|big|small|font|span|div|table|tr|td|ol|ul|li|dl|dd|dt|abbr|tt|code|pre|h[1-6])\b".
               "(?>[^>\"\']+|\"[^\"]*\"|'[^']*')*>)+~", $with, $data);
    }


    /**
     * [e]
     * Escape all significant special chars.
     *
     */
    function _escape($data) {
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    /**
     * [b]
     * Abort with fatal error. (Used as fallback for INPUT_DIRECT access.)
     *
     */
    function _disallow($data) {
        throw OutOfBoundsException("Direct \$_REQUEST[\"$this->__varname\"] is not allowed, add ->filter method, or change INPUT_DIRECT if needed.");
    }
    
    
    
    /**
     * Validate instead of sanitize.
     *







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    /**
     * [b]
     * Abort with fatal error. (Used as fallback for INPUT_DIRECT access.)
     *
     */
    function _disallow($data) {
        throw new OutOfBoundsException("Direct \$_REQUEST[\"$this->__varname\"] is not allowed, add ->filter method, or change INPUT_DIRECT if needed.");
    }
    
    
    
    /**
     * Validate instead of sanitize.
     *
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    /**
     * Executes current filter or filter chain on given $varname.
     *
     */
    function filter($varname, $reset_filter_afterwards=NULL) {

        // direct/raw access can occour if invoked via offsetGet[] or filter() method called directly
        if (empty($this->__filter)) {
            $this->__filter[] = array(INPUT_DIRECT, array());


            // or apply a pre-defined filter chain


            if (isset($this->__rules[$varname])) {
                // must be in internal nested format
                $this->__filter = $this->rules[$varname];


            }
        }


        // retrieve value for selected input variable
        $this->__varname = $varname;



        if (isset($this->__vars[$varname])) {

            $data = $this->__vars[$varname];
        }
        elseif (count($this->__filter) and ("list" == $this->__filter[0][0])) {
            $data = NULL;    // do nothing, as values will be fetched by a multiplex handler
        }
        else {
            INPUT_QUIET or trigger_error("Undefined input variable \${$this->__title}['{$this->__varname}']", E_USER_NOTICE);   // undecorative
            $data = NULL;    // run through filters anyway (log)
        }
        
        // implicit ->array filter handling for lists (= if value is an array)
        $ARRAY = (ARRAY("array",(array)NULL));  # complex trigger token
        if (is_array($data) && !in_array($ARRAY, $this->__filter)) {
            array_unshift($this->__filter, array("array", array()));
        }
        
        // apply filters (we're building an ad-hoc merged array here, because ->apply works on the reference, and some filters expect ->__filter to contain the complete current list)
        $this->__filter = array_merge($this->__filter, $this->__always);
        $data = $this->apply($data, $this->__filter);
        
        // the Traversable array interface resets the filter list after each request, see ->current()







|
|
|
|
>
|
>
>

<
|
>
>


>


|
>
>
>
|
>


<
<
<
|
|
|


|
<
|
|







803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818

819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834



835
836
837
838
839
840

841
842
843
844
845
846
847
848
849
    
    /**
     * Executes current filter or filter chain on given $varname.
     *
     */
    function filter($varname, $reset_filter_afterwards=NULL) {

        // single array [["name"]] becomes varname
        if (is_array($varname) and count($varname)===1) {
            $varname = current($varname);
        }
        $this->__varname = $varname;

        // direct/raw access without any ->filtername prior offsetGet[] or plain filter() call
        if (empty($this->__filter)) {
            if (isset($this->__rules[$varname])) {

                $this->__filter = $this->rules[$varname];  // use a predefined filterset
            } else {
                $this->__filter = array( INPUT_DIRECT );  // direct access handler
            }
        }
        $first_handler = reset($this->__filter);

        // retrieve value for selected input variable
        $data = NULL;
        if (!is_scalar($varname) or $first_handler == "list" or $first_handler == "multi") {
            // one of the multiplex handlers supposedly picks it up
        }
        elseif (isset($this->__vars[$varname])) {
            // entry exists
            $data = $this->__vars[$varname];
        }



        elseif (!INPUT_QUIET) {
            trigger_error("Undefined input variable \${$this->__title}['{$this->__varname}']", E_USER_NOTICE);
            // run through filters anyway (for ->log)
        }
        
        // implicit ->array filter handling

        if (is_array($data) and $first_handler != "array") {
            array_unshift($this->__filter, "array");
        }
        
        // apply filters (we're building an ad-hoc merged array here, because ->apply works on the reference, and some filters expect ->__filter to contain the complete current list)
        $this->__filter = array_merge($this->__filter, $this->__always);
        $data = $this->apply($data, $this->__filter);
        
        // the Traversable array interface resets the filter list after each request, see ->current()
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
     *
     * It works on an array reference and with array_shift() because filters are allowed to
     * modify the list at runtime (->array requires to).
     *
     */
    function apply($data, &$filterchain) {
        while ($f = array_shift($filterchain)) {
            list($filtername, $args) = $f;
            
            // an override function name or closure was set
            if (isset($this->{"_$filtername"})) {
                $filtername = $this->{"_$filtername"};
            }
            // call _filter method
            if (is_string($filtername) && method_exists($this, "_$filtername")) {
                $data = call_user_func_array(array($this, "_$filtername"), array_merge(array($data), (array)$args));
            }
            // ordinary php function, or closure, or rebound method
            elseif (is_callable($filtername)) {
                $data = call_user_func($filtername, $data);
            }
            else {
                INPUT_QUIET>=2 or trigger_error("unknown filter '" . (is_scalar($filtername) ? $filtername : "closure") . "', falling back on wiping non-alpha characters from '{$this->__varname}'", E_USER_WARNING);
                $data = $this->_name($data);
            }
        }
        return $data;







|
|
|









|







862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
     *
     * It works on an array reference and with array_shift() because filters are allowed to
     * modify the list at runtime (->array requires to).
     *
     */
    function apply($data, &$filterchain) {
        while ($f = array_shift($filterchain)) {
            list($filtername, $args) = is_array($f) ? $f : array($f, array());

            // an override function name or closure exists
            if (isset($this->{"_$filtername"})) {
                $filtername = $this->{"_$filtername"};
            }
            // call _filter method
            if (is_string($filtername) && method_exists($this, "_$filtername")) {
                $data = call_user_func_array(array($this, "_$filtername"), array_merge(array($data), (array)$args));
            }
            // ordinary php function, or closure, or rebound method
            elseif (is_callable($filtername)) {
                $data = call_user_func_array($filtername, array_merge(array($data), $args));
            }
            else {
                INPUT_QUIET>=2 or trigger_error("unknown filter '" . (is_scalar($filtername) ? $filtername : "closure") . "', falling back on wiping non-alpha characters from '{$this->__varname}'", E_USER_WARNING);
                $data = $this->_name($data);
            }
        }
        return $data;
885
886
887
888
889
890
891


892

893
894
895
896
897
898
899
            $keys = $this->__varname;
        }
        else {
            $keys = explode(",", $this->__varname);
        }

        // slice out named values from ->__vars


        $data = array_intersect_key($this->__vars, array_flip($keys));


        // chain to _array multiplex handler
        if (!$pass_array) {
            return $this->_array($data);
        }
        // process fetched list as array (for user-land functions like http_build_query)
        else {







>
>
|
>







937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
            $keys = $this->__varname;
        }
        else {
            $keys = explode(",", $this->__varname);
        }

        // slice out named values from ->__vars
        $data = array_merge(
            array_fill_keys($keys, NULL),
            array_intersect_key($this->__vars, array_flip($keys))
        );

        // chain to _array multiplex handler
        if (!$pass_array) {
            return $this->_array($data);
        }
        // process fetched list as array (for user-land functions like http_build_query)
        else {
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
            $filtername = array_shift($args);
        }
        else {
            $args=array();
        }

        // Add filter to list
        $this->__filter[] = array($filtername, $args);

        // fluent interface
        return $this;
    }
    









|







1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
            $filtername = array_shift($args);
        }
        else {
            $args=array();
        }

        // Add filter to list
        $this->__filter[] = count($args) ? array($filtername, $args) : $filtername;

        // fluent interface
        return $this;
    }
    


1018
1019
1020
1021
1022
1023
1024
1025

1026
1027
1028

1029
1030
1031
1032
1033
1034
1035
1036
1037

1038
1039
1040
1041
1042
1043
1044
1045
     *  ->keys()
     * 
     * Has No Keys seems easy to remember.
     *
     */

    /**
     * isset/array_key_exists check.

     *
     */
    function has($name) {

        return isset($this->__vars[$name]);
    }
    
    /**
     * empty() probing,
     * Tests if variable is absent or falsy.
     *
     */
    function no($name) {

        return empty($this->__vars[$name]);
    }
    
    /**
     * Returns list of all contained keys.
     *
     */
    function keys() {







|
>


|
>
|




|


|
>
|







1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
     *  ->keys()
     * 
     * Has No Keys seems easy to remember.
     *
     */

    /**
     * isset/array_key_exists check;
     * may list multiple keys to check.
     *
     */
    function has($args) {
        $args = (func_num_args() > 1) ? func_get_args() : explode(",", $args);
        return count(array_intersect_key($this->__vars, array_flip($args))) == count($args);
    }
    
    /**
     * empty() probing,
     * Tests if named keys are absent or falsy.
     *
     */
    function no($args) {
        $args = (func_num_args() > 1) ? func_get_args() : explode(",", $args);
        return count(array_filter(array_intersect_key($this->__vars, array_flip($args)))) == 0;
    }
    
    /**
     * Returns list of all contained keys.
     *
     */
    function keys() {
1083
1084
1085
1086
1087
1088
1089
1090
1091

















1092
1093
1094
1095
1096
1097
1098
    /**
     * @hide Countable
     * 
     */
    function count() {
        return count($this->__vars);
    }
    
    

















    /**
     * @hide Allows testing variable presence with e.g. if ( $_POST() )
     *       Alternatively $_POST("var") is an alias to $_POST["var"].
     *
     */
    function __invoke($varname=NULL) {
    







|
|
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
    /**
     * @hide Countable
     * 
     */
    function count() {
        return count($this->__vars);
    }


    /**
     * @hide Make filtering functions available as static methods
     *       without underscore prefix for external invocation.
     */ 
    static function __callStatic($func, $args) {
        static $filter = "input";

        // Also eschew E_STRICT notices
        if (!is_object($filter)) {
            $filter = new input(array(), "\$_INLINE_INPUT");
        }

        return isset($filter->{"_$func"})
             ? call_user_func_array($filter->{"_$func"}, $args)
             : call_user_func_array(array($filter, "_$func"), $args);
    }

    /**
     * @hide Allows testing variable presence with e.g. if ( $_POST() )
     *       Alternatively $_POST("var") is an alias to $_POST["var"].
     *
     */
    function __invoke($varname=NULL) {
    
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
$_REQUEST = new input($_REQUEST, "_REQUEST");
$_GET = new input($_GET, "_GET");
$_POST = new input($_POST, "_POST");
$_COOKIE = new input($_COOKIE, "_COOKIE");
#$_SESSION
#$_ENV
#$_FILES required a special handler

//          print_r(  $_SERVER->list->text[[USER,HOME]]  );



?>







<
<
<



1194
1195
1196
1197
1198
1199
1200



1201
1202
1203
$_REQUEST = new input($_REQUEST, "_REQUEST");
$_GET = new input($_GET, "_GET");
$_POST = new input($_POST, "_POST");
$_COOKIE = new input($_COOKIE, "_COOKIE");
#$_SESSION
#$_ENV
#$_FILES required a special handler





?>

Added ext/php50.php.













































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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<?php
/**
 * api: php
 * title: 4_1 till 5_0
 * description: PHP 4.1 till 5.0 compat code, practically obsolete
 *
 * Moved out from the main upgrade.php, because there's little likelihood
 * anybody is still practically using such ancient setups.
 *
 */




/**
 *                                   ------------------------------ 5.0 ---
 * @group 5_0
 * @since 5.0
 *
 * PHP 5.0 introduces the Zend Engine 2 with new object-orientation features
 * which cannot be reimplemented/defined for PHP4. The additional procedures
 * and functions however can.
 *
 * @emulated
 *    stripos
 *    strripos
 *    str_ireplace
 *    get_headers
 *    headers_list
 *    fprintf
 *    vfprintf
 *    str_split
 *    http_build_query
 *    convert_uuencode
 *    convert_uudecode
 *    scandir
 *    idate
 *    time_nanosleep
 *    strpbrk
 *    get_declared_interfaces
 *    array_combine
 *    array_walk_recursive
 *    substr_compare
 *    spl_classes
 *    class_parents
 *    session_commit
 *    dns_check_record
 *    dns_get_mx
 *    setrawcookie
 *    file_put_contents
 *    COUNT_NORMAL
 *    COUNT_RECURSIVE
 *    count_recursive
 *    FILE_USE_INCLUDE_PATH
 *    FILE_IGNORE_NEW_LINES
 *    FILE_SKIP_EMPTY_LINES
 *    FILE_APPEND
 *    FILE_NO_DEFAULT_CONTEXT
 *    E_STRICT
 *    mysqli_set_charset
 *
 * @missing
 *    proc_nice
 *    dns_get_record
 *    date_sunrise - undoc.
 *    date_sunset - undoc.
 *    PHP_CONFIG_FILE_SCAN_DIR
 *    clone
 *
 * @unimplementable
 *    set_exception_handler
 *    restore_exception_handler
 *    debug_print_backtrace - in ext, needs4.3
 *    debug_backtrace       - stub
 *    class_implements
 *    proc_terminate
 *    proc_get_status
 *    range        - new param
 *    microtime    - new param
 *
 */
 
 


#-- constant: end of line
if (!defined("PHP_EOL")) { define("PHP_EOL", ( (DIRECTORY_SEPARATOR == "\\") ? "\015\012" : (strncmp(PHP_OS, "D", 1) ? "\012" : "\015") )  ); } # "D" for Darwin



/**
 * case-insensitive string search function,
 * - finds position of first occourence of a string c-i
 * - parameters identical to strpos()
 */
if (!function_exists("stripos")) {
   function stripos($haystack, $needle, $offset=NULL) {
   
      #-- simply lowercase args
      $haystack = strtolower($haystack);
      $needle = strtolower($needle);
      
      #-- search
      $pos = strpos($haystack, $needle, $offset);
      return($pos);
   }
}




/**
 * case-insensitive string search function
 * - but this one starts from the end of string (right to left)
 * - offset can be negative or positive
 * 
 */
if (!function_exists("strripos")) {
   function strripos($haystack, $needle, $offset=NULL) {

      #-- lowercase incoming strings
      $haystack = strtolower($haystack);
      $needle = strtolower($needle);

      #-- [-]$offset tells to ignore a few string bytes,
      #   we simply cut a bit from the right
      if (isset($offset) && ($offset < 0)) {
         $haystack = substr($haystack, 0, strlen($haystack) - 1);
      }

      #-- let PHP do it
      $pos = strrpos($haystack, $needle);

      #-- [+]$offset => ignore left haystack bytes
      if (isset($offset) && ($offset > 0) && ($pos > $offset)) {
         $pos = false;
      }

      #-- result      
      return($pos);
   }
}


/**
 * case-insensitive version of str_replace
 * 
 */
if (!function_exists("str_ireplace")) {
   function str_ireplace($search, $replace, $subject, $count=NULL) {

      #-- call ourselves recursively, if parameters are arrays/lists 
      if (is_array($search)) {
         $replace = array_values($replace);
         foreach (array_values($search) as $i=>$srch) {
            $subject = str_ireplace($srch, $replace[$i], $subject);
         }
      }
      
      #-- sluice replacement strings through the Perl-regex module
      #   (faster than doing it by hand)
      else {
         $replace = addcslashes($replace, "$\\");
         $search = "{" . preg_quote($search) . "}i";
         $subject = preg_replace($search, $replace, $subject);
      }

      #-- result
      return($subject);
   }
}


/**
 * performs a http HEAD request
 * 
 */
if (!function_exists("get_headers")) {
   function get_headers($url, $parse=0) {
   
      #-- extract URL parts ($host, $port, $path, ...)
      $c = parse_url($url);
      $c = array_merge(array("port"=>"80", "path"=>"/"), $c);
      extract($c);
      
      #-- try to open TCP connection      
      $f = fsockopen($host, $port, $errno, $errstr, $timeout=15);
      if (!$f) {
         return;
      }

      #-- send request header
      socket_set_blocking($f, true);
      fwrite($f, "HEAD $path HTTP/1.0\015\012"
               . "Host: $host\015\012"
               . "Connection: close\015\012"
               . "Accept: */*, xml/*\015\012"
               . "User-Agent: ".trim(ini_get("user_agent"))."\015\012"
               . "\015\012");

      #-- read incoming lines
      $ls = array();
      while ( !feof($f) && ($line = trim(fgets($f, 1<<16))) ) {
         
         #-- read header names to make result an hash (names in array index)
         if ($parse) {
            if ($l = strpos($line, ":")) {
               $name = substr($line, 0, $l);
               $value = trim(substr($line, $l + 1));
               #-- merge headers
               if (isset($ls[$name])) {
                  $ls[$name] .= ", $value";
               }
               else {
                  $ls[$name] = $value;
               }
            }
            #-- HTTP response status header as result[0]
            else {
               $ls[] = $line;
            }
         }
         
         #-- unparsed header list (numeric indices)
         else {
            $ls[] = $line;
         }
      }

      #-- close TCP connection and give result
      fclose($f);
      return($ls);
   }
}


/**
 * @stub
 * list of already/potentially sent HTTP responsee headers(),
 * CANNOT be implemented (except for Apache module maybe)
 * 
 */
if (!function_exists("headers_list")) {
   function headers_list() {
      trigger_error("headers_list(): not supported by this PHP version", E_USER_WARNING);
      return (array)NULL;
   }
}


/**
 * write formatted string to stream/file,
 * arbitrary numer of arguments
 * 
 */
if (!function_exists("fprintf")) {
   function fprintf(/*...*/) {
      $args = func_get_args();
      $stream = array_shift($args);
      return fwrite($stream, call_user_func_array("sprintf", $args));
   }
}


/**
 * write formatted string to stream, args array
 * 
 */
if (!function_exists("vfprintf")) {
   function vfprintf($stream, $format, $args=NULL) {
      return fwrite($stream, vsprintf($format, $args));
   }
}


/**
 * splits a string in evenly sized chunks
 * 
 * @return array
 */
if (!function_exists("str_split")) {
   function str_split($str, $chunk=1) {
      $r = array();
      
      #-- return back as one chunk completely, if size chosen too low
      if ($chunk < 1) {
         $r[] = $str;
      }
      
      #-- add substrings to result array until subject strings end reached
      else {
         $len = strlen($str);
         for ($n=0; $n<$len; $n+=$chunk) {
            $r[] = substr($str, $n, $chunk);
         }
      }
      return($r);
   }
}


/**
 * constructs a QUERY_STRING (application/x-www-form-urlencoded format, non-raw)
 * from a nested array/hash with name=>value pairs
 * - only first two args are part of the original API - rest used for recursion
 *
 * @param  mixed  $vars           variable data for query string
 * @param  string $int_prefix     (optional)
 * @param  string $subarray_pfix  (optional)
 * @param integer $level  
 * @return mixed
 */
if (!function_exists("http_build_query")) {
   function http_build_query($vars, $int_prefix="", $subarray_pfix="", $level=0) {
   
      #-- empty starting string
      $s = "";
      ($SEP = ini_get("arg_separator.output")) or ($SEP = "&");
      
      #-- traverse hash/array/list entries 
      foreach ($vars as $index=>$value) {
         
         #-- add sub_prefix for subarrays (happens for recursed innovocation)
         if ($subarray_pfix) {
            if ($level) {
               $index = "[" . $index . "]";
            }
            $index =  $subarray_pfix . $index;
         }
         #-- add user-specified prefix for integer-indices
         elseif (is_int($index) && strlen($int_prefix)) {
            $index = $int_prefix . $index;
         }
         
         #-- recurse for sub-arrays
         if (is_array($value)) {
            $s .= http_build_query($value, "", $index, $level + 1);
         }
         else {   // or just literal URL parameter
            $s .= $SEP . $index . "=" . urlencode($value);
         }
      }
      
      #-- remove redundant "&" from first round (-not checked above to simplifiy loop)
      if (!$subarray_pfix) {
         $s = substr($s, strlen($SEP));
      }

      #-- return result / to previous array level and iteration
      return($s);
   }
}


/**
 * transform into 3to4 uuencode
 * - this is the bare encoding, not the uu file format
 * 
 * @param  string
 * @return string
 */
if (!function_exists("convert_uuencode")) {
   function convert_uuencode($bin) {

      #-- init vars
      $out = "";
      $line = "";
      $len = strlen($bin);
      $bin .= "\01\01\01";   // PHP and uuencode(1) use some special garbage??, looks like "\000"* and "`\n`" simply appended

      #-- canvass source string
      for ($n=0; $n<$len; ) {
      
         #-- make 24-bit integer from first three bytes
         $x = (ord($bin[$n++]) << 16)
            + (ord($bin[$n++]) <<  8)
            + (ord($bin[$n++]) <<  0);
            
         #-- disperse that into 4 ascii characters
         $line .= chr( 32 + (($x >> 18) & 0x3f) )
                . chr( 32 + (($x >> 12) & 0x3f) )
                . chr( 32 + (($x >>  6) & 0x3f) )
                . chr( 32 + (($x >>  0) & 0x3f) );
                
         #-- cut lines, inject count prefix before each
         if (($n % 45) == 0) {
            $out .= chr(32 + 45) . "$line\n";
            $line = "";
         }
      }

      #-- throw last line, +length prefix
      if ($trail = ($len % 45)) {
         $out .= chr(32 + $trail) . "$line\n";
      }

      // uuencode(5) doesn't tell so, but spaces are replaced with the ` char in most implementations
      $out = strtr("$out \n", " ", "`");
      return($out);
   }
}


/**
 * decodes uuencoded() data again
 *
 * @param  string $from  
 * @return string
 */
if (!function_exists("convert_uudecode")) {
   function convert_uudecode($from) {

      #-- prepare
      $out = "";
      $from = strtr($from, "`", " ");
      
      #-- go through lines
      foreach(explode("\n", ltrim($from)) as $line) {
         if (!strlen($line)) {
            break;  // end reached
         }
         
         #-- current line length prefix
         unset($num);
         $num = ord($line{0}) - 32;
         if (($num <= 0) || ($num > 62)) {  // 62 is the maximum line length
            break;          // according to uuencode(5), so we stop here too
         }
         $line = substr($line, 1);
         
         #-- prepare to decode 4-char chunks
         $add = "";
         for ($n=0; strlen($add)<$num; ) {
         
            #-- merge 24 bit integer from the 4 ascii characters (6 bit each)
            $x = ((ord($line[$n++]) - 32) << 18)
               + ((ord($line[$n++]) - 32) << 12)  // were saner with "& 0x3f"
               + ((ord($line[$n++]) - 32) <<  6)
               + ((ord($line[$n++]) - 32) <<  0);
               
            #-- reconstruct the 3 original data chars
            $add .= chr( ($x >> 16) & 0xff )
                  . chr( ($x >>  8) & 0xff )
                  . chr( ($x >>  0) & 0xff );
         }

         #-- cut any trailing garbage (last two decoded chars may be wrong)
         $out .= substr($add, 0, $num);
         $line = "";
      }

      return($out);
   }
}


/**
 * return array of filenames in a given directory
 * (only works for local files)
 *
 * @param  string $dirname  
 * @param  bool   $desc  
 * @return array
 */
if (!function_exists("scandir")) {
   function scandir($dirname, $desc=0) {
   
      #-- check for file:// protocol, others aren't handled
      if (strpos($dirname, "file://") === 0) {
         $dirname = substr($dirname, 7);
         if (strpos($dirname, "localh") === 0) {
            $dirname = substr($dirname, strpos($dirname, "/"));
         }
      }
      
      #-- directory reading handle
      if ($dh = opendir($dirname)) {
         $ls = array();
         while ($fn = readdir($dh)) {
            $ls[] = $fn;  // add to array
         }
         closedir($dh);
         
         #-- sort filenames
         if ($desc) {
            rsort($ls);
         }
         else {
            sort($ls);
         }
         return $ls;
      }

      #-- failure
      return false;
   }
}


/**
 * like date(), but returns an integer for given one-letter format parameter
 *
 * @param  string  $formatchar
 * @param  integer $timestamp
 * @return integer
 */
if (!function_exists("idate")) {
   function idate($formatchar, $timestamp=NULL) {
   
      #-- reject non-simple type parameters
      if (strlen($formatchar) != 1) {
         return false;
      }
      
      #-- get current time, if not given
      if (!isset($timestamp)) {
         $timestamp = time();
      }
      
      #-- get and turn into integer
      $str = date($formatchar, $timestamp);
      return (int)$str;
   }
}



/**
 * combined sleep() and usleep() 
 * 
 */
if (!function_exists("time_nanosleep")) {
   function time_nanosleep($sec, $nano) {
      sleep($sec);
      usleep($nano);
   }
}




/**
 * search first occourence of any of the given chars, returns rest of haystack
 * (char_list must be a string for compatibility with the real PHP func)
 *
 * @param  string $haystack  
 * @param  string $char_list  
 * @return integer
 */
if (!function_exists("strpbrk")) {
   function strpbrk($haystack, $char_list) {
   
      #-- prepare
      $len = strlen($char_list);
      $min = strlen($haystack);
      
      #-- check with every symbol from $char_list
      for ($n = 0; $n < $len; $n++) {
         $l = strpos($haystack, $char_list{$n});
         
         #-- get left-most occourence
         if (($l !== false) && ($l < $min)) {
            $min = $l;
         }
      }
      
      #-- result
      if ($min) {
         return(substr($haystack, $min));
      }
      else {
         return(false);
      }
   }
}



/**
 * logo image activation URL query strings (gaga feature)
 * 
 */
if (!function_exists("php_real_logo_guid")) {
   function php_real_logo_guid() { return php_logo_guid(); }
   function php_egg_logo_guid() { return zend_logo_guid(); }
}


/**
 * no need to implement this
 * (there aren't interfaces in PHP4 anyhow)
 * 
 */
if (!function_exists("get_declared_interfaces")) {
   function get_declared_interfaces() {
      trigger_error("get_declared_interfaces(): Current script won't run reliably with PHP4.", E_USER_WARNING);
      return( (array)NULL );
   }
}



/**
 * creates an array from lists of $keys and $values
 * (both should have same number of entries)
 *
 * @param  array $keys  
 * @param  array $values  
 * @return array
 */
if (!function_exists("array_combine")) {
   function array_combine($keys, $values) {
   
      #-- convert input arrays into lists
      $keys = array_values($keys);
      $values = array_values($values);
      $r = array();
      
      #-- one from each
      foreach ($values as $i=>$val) {
         if ($key = $keys[$i]) {
            $r[$key] = $val;
         }
         else {
            $r[] = $val;   // useless, PHP would have long aborted here
         }
      }
      return($r);
   }
}


/**
 * apply userfunction to each array element (descending recursively)
 * use it like:  array_walk_recursive($_POST, "stripslashes");
 * - $callback can be static function name or object/method, class/method
 *
 * @param  array  $input  
 * @param  string $callback  
 * @param  array  $userdata  (optional)
 * @return array
 */
if (!function_exists("array_walk_recursive")) {
   function array_walk_recursive(&$input, $callback, $userdata=NULL) {
      #-- each entry
      foreach ($input as $key=>$value) {

         #-- recurse for sub-arrays
         if (is_array($value)) {
            array_walk_recursive($input[$key], $callback, $userdata);
         }

         #-- $callback handles scalars
         else {
            call_user_func_array($callback, array(&$input[$key], $key, $userdata) );
         }
      }

      // no return value
   }
}


/**
 * complicated wrapper around substr() and and strncmp()
 *
 * @param  string  $haystack  
 * @param  string  $needle  
 * @param  integer $offset  
 * @param  integer $len  
 * @param  integer $ci  
 * @return mixed
 */
if (!function_exists("substr_compare")) {
   function substr_compare($haystack, $needle, $offset=0, $len=0, $ci=0) {

      #-- check params   
      if ($len <= 0) {   // not well documented
         $len = strlen($needle);
         if (!$len) { return(0); }
      }
      #-- length exception
      if ($len + $offset >= strlen($haystack)) {
         trigger_error("substr_compare: given length exceeds main_str", E_USER_WARNING);
         return(false);
      }

      #-- cut
      if ($offset) {
         $haystack = substr($haystack, $offset, $len);
      }
      #-- case-insensitivity
      if ($ci) {
         $haystack = strtolower($haystack);
         $needle = strtolower($needle);
      }

      #-- do
      return(strncmp($haystack, $needle, $len));
   }
}


/**
 * stub, returns empty list as usual;
 * you must load "ext/spl.php" beforehand to get this
 * 
 */
if (!function_exists("spl_classes")) {
   function spl_classes() {
      trigger_error("spl_classes(): not built into this PHP version");
      return (array)NULL;
   }
}



/**
 * gets you list of class names the given objects class was derived from, slow
 *
 * @param  object $obj  
 * @return object
 */
if (!function_exists("class_parents")) {
   function class_parents($obj) {
   
      #-- first get full list
      $all = get_declared_classes();
      $r = array();
      
      #-- filter out
      foreach ($all as $potential_parent) {
         if (is_subclass_of($obj, $potential_parent)) {
            $r[$potential_parent] = $potential_parent;
         }
      }
      return($r);
   }
}


/**
 * an alias
 * 
 */
if (!function_exists("session_commit") && function_exists("session_write_close")) {
   function session_commit() {
      // simple
      session_write_close();
   }
}


/**
 * aliases
 *
 * @param  mixed $host  
 * @param  mixed $type  (optional)
 * @return mixed
 */
if (!function_exists("dns_check_record")) {
   function dns_check_record($host, $type=NULL) {
      // synonym to
      return checkdnsrr($host, $type);
   }
}
if (!function_exists("dns_get_mx")) {
   function dns_get_mx($host, $mx) {
      $args = func_get_args();
      // simple alias - except the optional, but referenced third parameter
      if ($args[2]) {
         $w = & $args[2];
      }
      else {
         $w = false;
      }
      return getmxrr($host, $mx, $w);
   }
}


/**
 * setrawcookie(),
 * can this be emulated 100% exactly?
 *
 * @param  string $name 
 * @param  mixed  $value
 * @param  mixed  $expire
 * @param  mixed  $path
 * @param  mixed  $domain
 * @param integer $secure
 * @return string
 */
if (!function_exists("setrawcookie")) {
   // we output everything directly as HTTP header(), PHP doesn't seem
   // to manage an internal cookie list anyhow
   function setrawcookie($name, $value=NULL, $expire=NULL, $path=NULL, $domain=NULL, $secure=0) {
      if (isset($value) && strpbrk($value, ",; \r\t\n\f\014\013")) {
         trigger_error("setrawcookie: value may not contain any of ',; \r\n' and some other control chars; thrown away", E_USER_WARNING);
      }
      else {
         $h = "Set-Cookie: $name=$value"
            . ($expire ? "; expires=" . gmstrftime("%a, %d-%b-%y %H:%M:%S %Z", $expire) : "")
            . ($path ? "; path=$path": "")
            . ($domain ? "; domain=$domain" : "")
            . ($secure ? "; secure" : "");
         header($h);
      }
   }
}


/**
 * write-at-once file access (counterpart to file_get_contents)
 *
 * @param  integer $filename
 * @param  mixed   $content  
 * @param  integer $flags 
 * @param  mixed   $resource
 * @return integer
 */
if (!function_exists("file_put_contents")) {
   function file_put_contents($filename, $content, $flags=0, $resource=NULL) {

      #-- prepare
      $mode = ($flags & FILE_APPEND ? "a" : "w" ) ."b";
      $incl = $flags & FILE_USE_INCLUDE_PATH;
      $length = strlen($content);
//      $resource && trigger_error("EMULATED file_put_contents does not support \$resource parameter.", E_USER_ERROR);
      
      #-- write non-scalar?
      if (is_array($content) || is_object($content)) {
         $content = implode("", (array)$content);
      }

      #-- open for writing
      $f = fopen($filename, $mode, $incl);
      if ($f) {
      
         // locking
         if (($flags & LOCK_EX) && !flock($f, LOCK_EX)) {
            return fclose($f) && false;
         }

         // write
         $written = fwrite($f, $content);
         fclose($f);
         
         #-- only report success, if completely saved
         return($length == $written);
      }
   }
}


/**
 * file-related constants
 *
 */
if (!defined("FILE_USE_INCLUDE_PATH")) { define("FILE_USE_INCLUDE_PATH", 1); }
if (!defined("FILE_IGNORE_NEW_LINES")) { define("FILE_IGNORE_NEW_LINES", 2); }
if (!defined("FILE_SKIP_EMPTY_LINES")) { define("FILE_SKIP_EMPTY_LINES", 4); }
if (!defined("FILE_APPEND")) { define("FILE_APPEND", 8); }
if (!defined("FILE_NO_DEFAULT_CONTEXT")) { define("FILE_NO_DEFAULT_CONTEXT", 16); }



#-- more new constants for 5.0
/**
 * @since PHP 5
 */
if (!defined("E_STRICT")) { define("E_STRICT", 2048); }  // _STRICT is a special case of _NOTICE (_DEBUG)
# PHP_CONFIG_FILE_SCAN_DIR




#-- array count_recursive()
if (!defined("COUNT_NORMAL")) { define("COUNT_NORMAL", 0); }      // count($array, 0);
if (!defined("COUNT_RECURSIVE")) { define("COUNT_RECURSIVE", 1); }    // use count_recursive()



/**
 * @since never
 * @nonstandard
 * 
 * we introduce a new function, because we cannot emulate the
 * newly introduced second parameter to count()
 * 
 * @param  array $array 
 * @param  integer $mode
 * @return integer
 */
if (!function_exists("count_recursive")) {
   function count_recursive($array, $mode=1) {
      if (!$mode) {
         return(count($array));
      }
      else {
         $c = count($array);
         foreach ($array as $sub) {
            if (is_array($sub)) {
               $c += count_recursive($sub);
            }
         }
         return($c);
      }
   }
}



/**
 * Sets the default client character set.
 *
 * @compat
 *    Procedural style
 * @bugs
 *    PHP documentation says this function exists in PHP 5 >= 5.0.5,
 *    but it also depends on the versions of external libraries, e.g.,
 *    php_mysqli.dll and libmysql.dll.
 *
 * @param $link    mysqli MySQLi connection resource
 * @param $charset string Character set
 * @return bool           TRUE on success, FALSE on failure
 */
if (!function_exists("mysqli_set_charset") && function_exists("mysqli_query")) {
   function mysqli_set_charset($link, $charset) {
      return mysqli_query($link, "SET NAMES '$charset'");
   }
}









/**
 *                                   ------------------------------ 4.4 ---
 * @group 4_4
 * @since 4.4
 *
 * PHP 4.4 is a bugfix and backporting version created after PHP 5. It went
 * mostly unchanged, but changes a few language semantics (e.g. references).
 *
 * @emulated
 *    PHP_INT_SIZE
 *    PHP_INT_MAX
 *    SORT_LOCALE_STRING
 *
 */

if (!defined("PHP_INT_SIZE")) { define("PHP_INT_SIZE", 4); }
if (!defined("PHP_INT_MAX")) { define("PHP_INT_MAX", 2147483647); }
if (!defined("SORT_LOCALE_STRING")) { define("SORT_LOCALE_STRING", 5); }






/**
 *                                   ------------------------------ 4.3 ---
 * @group 4_3
 * @since 4.3
 *
 *  Additions in 4.3 version of PHP interpreter.
 *
 * @emulated
 *    file_get_contents
 *    array_key_exists
 *    array_intersect_assoc
 *    array_diff_assoc
 *    html_entity_decode
 *    str_word_count
 *    str_shuffle
 *    get_include_path
 *    set_include_path
 *    restore_include_path
 *    fnmatch
 *    FNM_PATHNAME
 *    FNM_NOESCAPE
 *    FNM_PERIOD
 *    FNM_LEADING_DIR
 *    FNM_CASEFOLD
 *    FNM_EXTMATCH
 *    glob
 *    GLOB_MARK
 *    GLOB_NOSORT
 *    GLOB_NOCHECK
 *    GLOB_NOESCAPE
 *    GLOB_BRACE
 *    GLOB_ONLYDIR
 *    GLOB_NOCASE
 *    GLOB_DOTS
 *    __FUNCTION__
 *    PATH_SEPARATOR
 *    PHP_SHLIB_SUFFIX
 *    PHP_SAPI
 *    PHP_PREFIX
 *
 * @missing
 *    sha1_file
 *    sha1 - too much code, and has been reimplemented elsewhere
 *
 * @unimplementable
 *    money_format
 *
 */


/**
 * simplified file read-at-once function
 *
 * @param  string  $filename  
 * @param  integer $use_include_path  (optional)
 * @return string
 */
if (!function_exists("file_get_contents")) {
   function file_get_contents($filename, $use_include_path=1) {

      #-- open file, let fopen() report error
      $f = fopen($filename, "rb", $use_include_path);
      if (!$f) { return; }

      #-- read max 2MB
      $content = fread($f, 1<<21);
      fclose($f);
      return($content);
   }
}



/**
 * shell-like filename matching (* and ? globbing characters)
 *
 * @param  string $pattern  glob-pattern with *s and ?s
 * @param  string $fn       filename to match it against (without path)
 * @param integer $flags    (optional)
 * @return bool
 */
if (!function_exists("fnmatch")) {

   #-- associated constants
   if (!defined("FNM_PATHNAME")) { define("FNM_PATHNAME", 1<<0); }  // no wildcard ever matches a "/"
   if (!defined("FNM_NOESCAPE")) { define("FNM_NOESCAPE", 1<<1); }  // backslash can't escape meta chars
   if (!defined("FNM_PERIOD")) { define("FNM_PERIOD",   1<<2); }  // leading dot must be given explicit
   if (!defined("FNM_LEADING_DIR")) { define("FNM_LEADING_DIR", 1<<3); }  // not in PHP
   if (!defined("FNM_CASEFOLD")) { define("FNM_CASEFOLD", 0x50); }  // match case-insensitive
   if (!defined("FNM_EXTMATCH")) { define("FNM_EXTMATCH", 1<<5); }  // not in PHP
   
   #-- implementation
   function fnmatch($pattern, $fn, $flags=0x0000) {
      
      #-- 'hidden' files
      if ($flags & FNM_PERIOD) {
         if (($fn[0] == ".") && ($pattern[0] != ".")) {
            return(false);    // abort early
         }
      }

      #-- case-insensitivity
      $rxci = "";
      if ($flags & FNM_CASEFOLD) {
         $rxci = "i";
      }
      #-- handline of pathname separators (/)
      $wild = ".";
      if ($flags & FNM_PATHNAME) {
         $wild = "[^/".DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR."]";
      }

      #-- check for cached regular expressions
      static $cmp = array();
      if (isset($cmp["$pattern+$flags"])) {
         $rx = $cmp["$pattern+$flags"];
      }

      #-- convert filename globs into regex
      else {
         $rx = preg_quote($pattern);
         $rx = strtr($rx, array(
            "\\*"=>"$wild*?", "\\?"=>"$wild", "\\["=>"[", "\\]"=>"]",
         ));
         $rx = "{^" . $rx . "$}" . $rxci;
         
         #-- cache
         if (count($cmp) >= 50) {
            $cmp = array();   // free
         }
         $cmp["$pattern+$flags"] = $rx;
      }
      
      #-- compare
      return(preg_match($rx, $fn));
   }
}


/**
 * file search and name matching (with shell patterns)
 *
 * @param  string  $pattern   search pattern and path ../* string
 * @param  integer $flags (optional)
 * @return array
 */
if (!function_exists("glob")) {

   #-- introduced constants
   if (!defined("GLOB_MARK")) { define("GLOB_MARK", 1<<0); }
   if (!defined("GLOB_NOSORT")) { define("GLOB_NOSORT", 1<<1); }
   if (!defined("GLOB_NOCHECK")) { define("GLOB_NOCHECK", 1<<2); }
   if (!defined("GLOB_NOESCAPE")) { define("GLOB_NOESCAPE", 1<<3); }
   if (!defined("GLOB_BRACE")) { define("GLOB_BRACE", 1<<4); }
   if (!defined("GLOB_ONLYDIR")) { define("GLOB_ONLYDIR", 1<<5); }
   if (!defined("GLOB_NOCASE")) { define("GLOB_NOCASE", 1<<6); }
   if (!defined("GLOB_DOTS")) { define("GLOB_DOTS", 1<<7); }
   // unlikely to work under Win(?), without replacing the explode() with
   // a preg_split() incorporating the native DIRECTORY_SEPARATOR as well

   #-- implementation
   function glob($pattern, $flags=0x0000) {
      $ls = array();
      $rxci = ($flags & GLOB_NOCASE) ? "i" : "";
#echo "\n=> glob($pattern)...\n";
      
      #-- transform glob pattern into regular expression
      #   (similar to fnmatch() but still different enough to require a second func)
      if ($pattern) {

         #-- look at each directory/fn spec part separately
         $parts2 = explode("/", $pattern);
         $pat = preg_quote($pattern);
         $pat = strtr($pat, array("\\*"=>".*?", "\\?"=>".?"));
         if ($flags ^ GLOB_NOESCAPE) {
            // uh, oh, ouuch - the above is unclean enough...
         }
         if ($flags ^ GLOB_BRACE) {
            $pat = preg_replace_callback("/\{(.+?)\}/", "glob___rx_brace", $pat);
         }
         $parts = explode("/", $pat);
#echo "parts == ".implode(" // ", $parts) . "\n";
         $lasti = count($parts) - 1;
         $dn = "";
         foreach ($parts as $i=>$p) {

            #-- basedir included (yet no pattern matching necessary)
            if (!strpos($p, "*?") && (strpos($p, ".?")===false)) {
               $dn .= $parts2[$i] . ($i!=$lasti ? "/" : "");
#echo "skip:$i, cause no pattern matching char found -> only a basedir spec\n";
               continue;
            }
            
            #-- start reading dir + match filenames against current pattern
            if ($dh = opendir($dn ?$dn:'.')) {
               $with_dot = ($p[1]==".") || ($flags & GLOB_DOTS);
#echo "part:$i:$p\n";
#echo "reading dir \"$dn\"\n";
               while ($fn = readdir($dh)) {
                  if (preg_match("\007^$p$\007$rxci", $fn)) {

                     #-- skip over 'hidden' files
                     if (($fn[0] == ".") && !$with_dot) {
                        continue;
                     }

                     #-- add filename only if last glob/pattern part
                     if ($i==$lasti) {
                        if (is_dir("$dn$fn")) {
                           if ($flags & GLOB_ONLYDIR) {
                              continue;
                           }
                           if ($flags & GLOB_MARK) {
                              $fn .= "/";
                           }
                        }
#echo "adding '$fn' for dn=$dn to list\n";
                        $ls[] = "$dn$fn";
                     }

                     #-- initiate a subsearch, merge result list in
                     elseif (is_dir("$dn$fn")) {
                        // add reamaining search patterns to current basedir
                        $remaind = implode("/", array_slice($parts2, $i+1));
                        $ls = array_merge($ls, glob("$dn$fn/$remaind", $flags));
                     }
                  }
               }
               closedir($dh);

               #-- prevent scanning a 2nd part/dir in same glob() instance:
               break;  
            }

            #-- given dirname doesn't exist
            else {
               return($ls);
            }

         }// foreach $parts
      }

      #-- return result list
      if (!$ls && ($flags & GLOB_NOCHECK)) {
         $ls[] = $pattern;
      }
      if ($flags ^ GLOB_NOSORT) {
         sort($ls);
      }
#print_r($ls);
#echo "<=\n";
      return($ls);
   }
   function glob___rx_brace($m) {
      return "(?:" . strtr($m[1], ",", "|") . ")";
   }
} //@FIX: fully comment, remove debugging code (- as soon as it works ;)



/**
 * redundant alias for isset()
 * 
 */
if (!function_exists("array_key_exists")) {
   function array_key_exists($key, $search) {
      return isset($search[$key]);
   }
}


/**
 * who could need that?
 * 
 */
if (!function_exists("array_intersect_assoc")) {
   function array_intersect_assoc( /*array, array, array...*/ ) {

      #-- parameters, prepare
      $in = func_get_args();
      $cmax = count($in);
      $whatsleftover = array();
      
      #-- walk through each array pair
      #   (take first as checklist)
      foreach ($in[0] as $i => $v) {
         for ($c = 1; $c < $cmax; $c++) {
            #-- remove entry, as soon as it isn't present
            #   in one of the other arrays
            if (!isset($in[$c][$i]) || (@$in[$c][$i] !== $v)) {
               continue 2;
            }
         }
         #-- it was found in all other arrays
         $whatsleftover[$i] = $v;
      }
      return $whatsleftover;
   }
}


/**
 * the opposite of the above
 * 
 */
if (!function_exists("array_diff_assoc")) {
   function array_diff_assoc( /*array, array, array...*/ ) {

      #-- params
      $in = func_get_args();
      $diff = array();
      
      #-- compare each array with primary/first
      foreach ($in[0] as $i=>$v) {
         for ($c=1; $c<count($in); $c++) {
            #-- skip as soon as it matches with entry in another array
            if (isset($in[$c][$i]) && ($in[$c][$i] == $v)) {
               continue 2;
            }
         }
         #-- else
         $diff[$i] = $v;
      }
      return $diff;
   }
}


/**
 * opposite of htmlentities
 * 
 */
if (!function_exists("html_entity_decode")) {
   function html_entity_decode($string, $quote_style=ENT_COMPAT, $charset="ISO-8859-1") {
      //@FIX: we fall short on anything other than Latin-1
      $y = array_flip(get_html_translation_table(HTML_ENTITIES, $quote_style));
      return strtr($string, $y);
   }
}


/**
 * extracts single words from a string
 * 
 */
if (!function_exists("str_word_count")) {
   function str_word_count($string, $result=0) {
   
      #-- let someone else do the work
      preg_match_all('/([\w](?:[-\'\w]?[\w]+)*)/', $string, $uu);

      #-- return full word list
      if ($result == 1) {
         return($uu[1]);
      }
      
      #-- array() of $pos=>$word entries
      elseif ($result >= 2) {
         $r = array();
         $l = 0;
         foreach ($uu[1] as $word) {
            $l = strpos($string, $word, $l);
            $r[$l] = $word;
            $l += strlen($word);  // speed up next search
         }
         return($r);
      }

      #-- only count
      else {
         return(count($uu[1]));
      }
   }
}


/**
 * creates a permutation of the given strings characters
 * (let's hope the random number generator was alread initialized)
 * 
 */
if (!function_exists("str_shuffle")) {
   function str_shuffle($str) {
      $r = "";

      #-- cut string down with every iteration
      while (strlen($str)) {
         $n = strlen($str) - 1;
         if ($n) {
            $n = rand(0, $n);   // glibcs` rand is ok since 2.1 at least
         }
         
         #-- cut out elected char, add to result string
         $r .= $str{$n};
         $str = substr($str, 0, $n) . substr($str, $n + 1);
      }
      return($r);
   }
}


/**
 * simple shorthands
 * 
 */
if (!function_exists("get_include_path")) {
   function get_include_path() {
      return(get_cfg_var("include_path"));
   }
   function set_include_path($new) {
      return ini_set("include_path", $new);
   }
   function restore_include_path() {
      ini_restore("include_path");
   }
}


#-- constants for 4.3
   if (!defined("PATH_SEPARATOR")) { define("PATH_SEPARATOR", ((DIRECTORY_SEPARATOR=='\\') ? ';' :':')); }
   if (!defined("PHP_SHLIB_SUFFIX")) { define("PHP_SHLIB_SUFFIX", ((DIRECTORY_SEPARATOR=='\\') ? 'dll' :'so')); }
   if (!defined("PHP_SAPI")) { define("PHP_SAPI", php_sapi_name()); }
   if (!defined("__FUNCTION__")) { define("__FUNCTION__", NULL); }   // empty string would signalize main()


#-- not identical to what PHP reports (it seems to `which` for itself)
if (!defined("PHP_PREFIX") && isset($_ENV["_"])) { define("PHP_PREFIX", substr($_ENV["_"], 0, strpos($_ENV["_"], "bin/"))); }






/**
 *                                   ------------------------------ 4.2 ---
 * @group 4_2
 * @since 4.2
 *
 *
 *  Functions added in PHP 4.2 interpreters.
 *
 *
 * @emulated
 *   str_rot13
 *   array_change_key_case
 *   array_fill
 *   array_chunk
 *   md5_file
 *   is_a
 *   fmod
 *   floatval
 *   is_infinite
 *   is_nan
 *   is_finite
 *   var_export
 *   strcoll
 * @missing
 *   ...
 *
 *   almost complete!?
 *
 *
 */


/**
 * shy away from this function - it was broken in all PHP4.2 releases,
 * and our emulation here won't change that
 *
 * @param  string $str  
 * @return string
 */
if (!function_exists("str_rot13")) {
   function str_rot13($str) {
      static $from = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
      static $to = "NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm";
      return strtr($str, $from, $to);
   }
}


/**
 * changes case of textual index keys
 *
 * @param  array $array  
 * @param  int   $case
 * @return array
 */
if (!function_exists("array_change_key_case")) {
   
   #-- introduced constants
   if (!defined("CASE_LOWER")) { define("CASE_LOWER", 0); }
   if (!defined("CASE_UPPER")) { define("CASE_UPPER", 1); }
   
   #-- implementation
   function array_change_key_case($array, $case=CASE_LOWER) {
   
      #-- loop through
      foreach ($array as $i=>$v) {
         #-- do anything for strings only
         if (is_string($i)) {
            unset($array[$i]);
            $i = ($case==CASE_LOWER) ? strtolower($i) : strtoupper($i);
            $array[$i] = $v;
         }
         // non-recursive      
      }
      return($array);
   }
}


/**
 * create fixed-length array made up of $value data
 * 
 */
if (!function_exists("array_fill")) {
   function array_fill($start_index, $num, $value) {

      #-- params
      $r = array();
      $i = $start_index;
      $end = $num + $start_index;
      
      #-- append
      for (; $i < $end; $i++)
      {
         $r[$i] = $value;
      }
      return($r);
   }
}


/**
 * split an array into evenly sized parts
 * 
 */
if (!function_exists("array_chunk")) {
   function array_chunk($input, $size, $preserve_keys=false) {
   
      #-- array for chunked output
      $r = array();
      $n = -1;  // chunk index
      
      #-- enum input array blocks
      foreach ($input as $i=>$v) {
      
         #-- new chunk
         if (($n < 0) || (count($r[$n]) == $size)) {
            $n++;
            $r[$n] = array();
         }
         
         #-- add input value into current [$n] chunk
         if ($preserve_keys) {
            $r[$n][$i] = $v;
         }
         else {
            $r[$n][] = $v;
         }
      }
      return($r);
   }
}


/**
 * convenience wrapper
 * 
 */
if (!function_exists("md5_file")) {
   function md5_file($filename, $raw_output=false) {

      #-- read file, apply hash function
      $r = md5(file_get_contents($filename, "rb"));
         
      #-- transform? and return
      if ($raw_output) {
         $r = pack("H*", $r);
      }
      return $r;
   }
}


/**
 * object type checking
 * 
 */
if (!function_exists("is_a")) {
   function is_a($obj, $classname) {
   
      #-- lowercase everything for comparison
      $classnaqme = strtolower($classname);
      $obj_class =  strtolower(get_class($obj));
      
      #-- two possible checks
      return ($obj_class == $classname) or is_subclass_of($obj, $classname);
   }
}


/**
 * floating point modulo
 * 
 */
if (!function_exists("fmod")) {
   function fmod($x, $y) {
      $r = $x / $y;
      $r -= (int)$r;
      $r *= $y;
      return($r);
   }
}


/**
 * makes float variable from string
 *
 * @param  string
 * @return float
 */
if (!function_exists("floatval")) {
   function floatval($str) {
      $str = ltrim($str);
      return (float)$str;
   }
}


/**
 * floats
 *
 */
if (!function_exists("is_infinite")) {

   #-- constants as-is
   if (!defined("NAN")) { define("NAN", "NAN"); }
   if (!defined("INF")) { define("INF", "INF"); }   // there is also "-INF"
   
   #-- simple checks
   function is_infinite($f) {
      $s = (string)$f;
      return(  ($s=="INF") || ($s=="-INF")  );
   }
   function is_nan($f) {
      $s = (string)$f;
      return(  $s=="NAN"  );
   }
   function is_finite($f) {
      $s = (string)$f;
      return(  !strpos($s, "N")  );
   }
}


/**
 * throws value-instantiation PHP-code for given variable
 *
 * @compat
 *    output differentiates from native PHP version,
 *    but functions identically
 *
 * @param  mixed $var  
 * @param  mixed $return  (optional) false
 * @param  string $indent  (optional) ""
 * @param  string $output  (optional) ""
 * @return mixed
 */
if (!function_exists("var_export")) {
   function var_export($var, $return=false, $indent="", $output="") {

      #-- output as in-class variable definitions
      if (is_object($var)) {
         $output = get_class($var) . "::_set_state(array(\n";
         foreach (((array)$var) as $id=>$var) {
            $output .= "  '\$$id' => " . var_export($var, true) . ",\n";
         }
         $output .= "));";
      }
      
      #-- array constructor
      elseif (is_array($var)) {
         foreach ($var as $id=>$next) {
            if ($output) $output .= ",\n";
                    else $output = "array(\n";
            $output .= $indent . '  '
                    . (is_numeric($id) ? $id : '"'.addslashes($id).'"')
                    . ' => ' . var_export($next, true, "$indent  ");
         }
         if (empty($output)) $output = "array(";
         $output .= "\n{$indent})";
       #if ($indent == "") $output .= ";";
      }
      
      #-- literals
      elseif (is_numeric($var)) {
         $output = "$var";
      }
      elseif (is_bool($var)) {
         $output = $var ? "true" : "false";
      }
      else {
         $output = "'" . preg_replace("/([\\\\\'])/", '\\\\$1', $var) . "'";
      }

      #-- done
      if ($return) {
         return($output);
      }
      else {
         print($output);
      }
   }
}


/**
 * @stub
 * @since existed since PHP 4.0.5, but under Win32 first since 4.3.2
 * 
 * strcmp() variant that respects locale setting,
 *
 * @param  string $str1  
 * @param  string $str2  
 * @return string
 */
if (!function_exists("strcoll")) {
   function strcoll($str1, $str2) {
      return strcmp($str1, $str2);
   }
}





/**
 *                                   ------------------------------ 4.1 ---
 * @group 4_1
 * @since 4.1
 *
 *
 * See also "ext/math41.php" for some more (rarely used mathematical funcs).
 *
 *
 * @emulated
 *   diskfreespace
 *   disktotalspace
 *   vprintf
 *   vsprintf
 *   import_request_variables
 *   hypot
 *   log1p
 *   expm1
 *   sinh
 *   cosh
 *   tanh
 *   asinh
 *   acosh
 *   atanh
 *   mhash
 *   mhash_count
 *   mhash_get_hash_name
 *   mhash_get_block_size
 * @missing
 *   nl_langinfo - unimpl?
 *   getmygid
 *   version_compare
 *
 */




/**
 * aliases (an earlier fallen attempt to unify PHP function names)
 * 
 */
if (!function_exists("diskfreespace")) {
   function diskfreespace() {
      return disk_free_sapce();
   }
   function disktotalspace() {
      return disk_total_sapce();
   }
}


/**
 * variable count of arguments (in array list) printf variant
 *
 * @param  string $format  
 * @param  mixed  $args
 * @output
 */
if (!function_exists("vprintf")) {
   function vprintf($format, $args=NULL) {
      call_user_func_array("fprintf", func_get_args());
   }
}


/**
 * same as above, but doesn't output directly and returns formatted string
 *
 * @param  string $format
 * @param  mixed  $args
 * @return string
 */
if (!function_exists("vsprintf")) {
   function vsprintf($format, $args=NULL) {
      $args = array_merge(array($format), array_values((array)$args));
      return call_user_func_array("sprintf", $args);
   }
}


/**
 * @extended
 *
 * can be used to simulate a register_globals=on environment
 *
 * @param  string $types   order of GET,POST,COOKIE variables
 * @param  string $pfix    prefix for imported variable names
 * @global $GLOBALS
 */
if (!function_exists("import_request_variables")) {
   function import_request_variables($types="GPC", $pfix="") {
      
      #-- associate abbreviations to global var names
      $alias = array(
         "G" => "_GET",
         "P" => "_POST",
         "C" => "_COOKIE",
         "S" => "_SERVER",   // non-standard
         "E" => "_ENV",      // non-standard
      );

      #-- alias long names (PHP < 4.0.6)    //@FIXME: does that belong here?
      if (!isset($_REQUEST)) {
         $_GET = & $HTTP_GET_VARS;
         $_POST = & $HTTP_POST_VARS;
         $_COOKIE = & $HTTP_COOKIE_VARS;
      }
      
      #-- copy
      foreach (str_split($types, 1) as $c) {
         if ($FROM = $alias[strtoupper($c)]) {
            foreach ($$FROM as $key=>$val) {
               if (!isset($GLOBALS[$pfix.$key])) {
                  $GLOBALS[$pfix . $key] = $val;
               }
            }
         }
      }
      // done
   }
}


// a few mathematical functions follow
// (wether we should really emulate them is a different question)

#-- me has no idea what this function means
if (!function_exists("hypot")) {
   function hypot($num1, $num2) {
      return sqrt($num1*$num1 + $num2*$num2);  // as per PHP manual ;)
   }
}

#-- more accurate logarithm func, but we cannot simulate it
#   (too much work, too slow in PHP)
if (!function_exists("log1p")) {
   function log1p($x) {
      return(  log(1+$x)  );
   }
   #-- same story for:
   function expm1($x) {
      return(  exp($x)-1  );
   }
}

#-- as per PHP manual
if (!function_exists("sinh")) {
   function sinh($f) {
      return(  (exp($f) - exp(-$f)) / 2  );
   }
   function cosh($f) {
      return(  (exp($f) + exp(-$f)) / 2  );
   }
   function tanh($f) {
      return(  sinh($f) / cosh($f)  );   // ok, that one makes sense again :)
   }
}

#-- these look a bit more complicated
if (!function_exists("asinh")) {
   function asinh($x) {
      return(  log($x + sqrt($x*$x+1))  );
   }
   function acosh($x) {
      return(  log($x + sqrt($x*$x-1))  );
   }
   function atanh($x) {
      return(  log1p( 2*$x / (1-$x) ) / 2  );
   }
}




/**
 * HMAC from RFC2104, but see also PHP_Compat or Crypt_HMAC
 *
 * @param  string $hashtype  which encoding functions to use
 * @param  string $text      plaintext to hash
 * @param  string $key       key data
 * @return string            hash
 */
if (!function_exists("mhash")) {

   #-- constants
   if (!defined("MHASH_CRC32")) { define("MHASH_CRC32", 0); }
   if (!defined("MHASH_MD5")) { define("MHASH_MD5", 1); }       // RFC1321
   if (!defined("MHASH_SHA1")) { define("MHASH_SHA1", 2); }      // RFC3174
   if (!defined("MHASH_TIGER")) { define("MHASH_TIGER", 7); }
   if (!defined("MHASH_MD4")) { define("MHASH_MD4", 16); }      // RFC1320
   if (!defined("MHASH_SHA256")) { define("MHASH_SHA256", 17); }
   if (!defined("MHASH_ADLER32")) { define("MHASH_ADLER32", 18); }
   
   #-- implementation
   function mhash($hashtype, $text, $key) {
   
      #-- hash function
      if (!($func = mhash_get_hash_name($hashtype)) || !function_exists($func)) {
         return trigger_error("mhash: cannot use hash algorithm #$hashtype/$func", E_USER_ERROR);
      }
      if (!$key) {
         trigger_error("mhash: called without key", E_USER_WARNING);
      }
      
      #-- params
      $bsize = mhash_get_block_size($hashtype);   // fixed size, 64

      #-- pad key
      if (strlen($key) > $bsize) {  // hash key, when it's too long
         $key = $func($key); 
         $key = pack("H*", $key);   // binarify
      }
      $key = str_pad($key, $bsize, "\0");  // fill up with NULs (1)
      
      #-- prepare inner and outer padding stream
      $ipad = str_pad("", $bsize, "6");   // %36
      $opad = str_pad("", $bsize, "\\");  // %5C
      
      #-- call hash func    // php can XOR strings for us
      $dgst = pack("H*",  $func(  ($key ^ $ipad)  .  $text  ));  // (2,3,4)
      $dgst = pack("H*",  $func(  ($key ^ $opad)  .  $dgst  ));  // (5,6,7)
      return($dgst);
   }
   
   #-- return which hash functions are implemented
   function mhash_count() {
      return(MHASH_SHA1);
   }
   
   #-- map numeric identifier to hash function name
   function mhash_get_hash_name($i) {
      static $hash_funcs = array(
          MHASH_CRC32 => "crc32",   // would need dechex()ing in main func?
          MHASH_MD5 => "md5",
          MHASH_SHA1 => "sha1",
      );
      return(strtoupper($hash_funcs[$i]));
   }
   
   #-- static value
   function mhash_get_block_size($i) {
      return(64);
   }
}





/**
 *
 * @group REMOVED_STUFF
 * @since unknown
 * @until unknown
 *
 *
 * @emulated
 *    ...
 *
 * @missing
 *    leak  - occupy a given amount of memory
 *
 */





/**
 *
 * group PRE_4_1
 * since 4.0
 * since 3.0
 *
 *
 * @emulated
 *    ...
 *
 *
 * No need to implement anything below that, because such old versions
 * will be incompatbile anyhow (- none of the newer superglobals known).
 *
 * but see also "ext/old"
 *
 */

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}













/**
 *                                   ------------------------------ 5.0 ---
 * @group 5_0
 * @since 5.0
 *
 * PHP 5.0 introduces the Zend Engine 2 with new object-orientation features
 * which cannot be reimplemented/defined for PHP4. The additional procedures
 * and functions however can.
 *
 * @emulated
 *    stripos
 *    strripos
 *    str_ireplace
 *    get_headers
 *    headers_list
 *    fprintf
 *    vfprintf
 *    str_split
 *    http_build_query
 *    convert_uuencode
 *    convert_uudecode
 *    scandir
 *    idate
 *    time_nanosleep
 *    strpbrk
 *    get_declared_interfaces
 *    array_combine
 *    array_walk_recursive
 *    substr_compare
 *    spl_classes
 *    class_parents
 *    session_commit
 *    dns_check_record
 *    dns_get_mx
 *    setrawcookie
 *    file_put_contents
 *    COUNT_NORMAL
 *    COUNT_RECURSIVE
 *    count_recursive
 *    FILE_USE_INCLUDE_PATH
 *    FILE_IGNORE_NEW_LINES
 *    FILE_SKIP_EMPTY_LINES
 *    FILE_APPEND
 *    FILE_NO_DEFAULT_CONTEXT
 *    E_STRICT
 *    mysqli_set_charset
 *
 * @missing
 *    proc_nice
 *    dns_get_record
 *    date_sunrise - undoc.
 *    date_sunset - undoc.
 *    PHP_CONFIG_FILE_SCAN_DIR
 *    clone
 *
 * @unimplementable
 *    set_exception_handler
 *    restore_exception_handler
 *    debug_print_backtrace - in ext, needs4.3
 *    debug_backtrace       - stub
 *    class_implements
 *    proc_terminate
 *    proc_get_status
 *    range        - new param
 *    microtime    - new param
 *
 */
 
 


#-- constant: end of line
if (!defined("PHP_EOL")) { define("PHP_EOL", ( (DIRECTORY_SEPARATOR == "\\") ? "\015\012" : (strncmp(PHP_OS, "D", 1) ? "\012" : "\015") )  ); } # "D" for Darwin



/**
 * case-insensitive string search function,
 * - finds position of first occourence of a string c-i
 * - parameters identical to strpos()
 */
if (!function_exists("stripos")) {
   function stripos($haystack, $needle, $offset=NULL) {
   
      #-- simply lowercase args
      $haystack = strtolower($haystack);
      $needle = strtolower($needle);
      
      #-- search
      $pos = strpos($haystack, $needle, $offset);
      return($pos);
   }
}




/**
 * case-insensitive string search function
 * - but this one starts from the end of string (right to left)
 * - offset can be negative or positive
 * 
 */
if (!function_exists("strripos")) {
   function strripos($haystack, $needle, $offset=NULL) {

      #-- lowercase incoming strings
      $haystack = strtolower($haystack);
      $needle = strtolower($needle);

      #-- [-]$offset tells to ignore a few string bytes,
      #   we simply cut a bit from the right
      if (isset($offset) && ($offset < 0)) {
         $haystack = substr($haystack, 0, strlen($haystack) - 1);
      }

      #-- let PHP do it
      $pos = strrpos($haystack, $needle);

      #-- [+]$offset => ignore left haystack bytes
      if (isset($offset) && ($offset > 0) && ($pos > $offset)) {
         $pos = false;
      }

      #-- result      
      return($pos);
   }
}


/**
 * case-insensitive version of str_replace
 * 
 */
if (!function_exists("str_ireplace")) {
   function str_ireplace($search, $replace, $subject, $count=NULL) {

      #-- call ourselves recursively, if parameters are arrays/lists 
      if (is_array($search)) {
         $replace = array_values($replace);
         foreach (array_values($search) as $i=>$srch) {
            $subject = str_ireplace($srch, $replace[$i], $subject);
         }
      }
      
      #-- sluice replacement strings through the Perl-regex module
      #   (faster than doing it by hand)
      else {
         $replace = addcslashes($replace, "$\\");
         $search = "{" . preg_quote($search) . "}i";
         $subject = preg_replace($search, $replace, $subject);
      }

      #-- result
      return($subject);
   }
}


/**
 * performs a http HEAD request
 * 
 */
if (!function_exists("get_headers")) {
   function get_headers($url, $parse=0) {
   
      #-- extract URL parts ($host, $port, $path, ...)
      $c = parse_url($url);
      $c = array_merge(array("port"=>"80", "path"=>"/"), $c);
      extract($c);
      
      #-- try to open TCP connection      
      $f = fsockopen($host, $port, $errno, $errstr, $timeout=15);
      if (!$f) {
         return;
      }

      #-- send request header
      socket_set_blocking($f, true);
      fwrite($f, "HEAD $path HTTP/1.0\015\012"
               . "Host: $host\015\012"
               . "Connection: close\015\012"
               . "Accept: */*, xml/*\015\012"
               . "User-Agent: ".trim(ini_get("user_agent"))."\015\012"
               . "\015\012");

      #-- read incoming lines
      $ls = array();
      while ( !feof($f) && ($line = trim(fgets($f, 1<<16))) ) {
         
         #-- read header names to make result an hash (names in array index)
         if ($parse) {
            if ($l = strpos($line, ":")) {
               $name = substr($line, 0, $l);
               $value = trim(substr($line, $l + 1));
               #-- merge headers
               if (isset($ls[$name])) {
                  $ls[$name] .= ", $value";
               }
               else {
                  $ls[$name] = $value;
               }
            }
            #-- HTTP response status header as result[0]
            else {
               $ls[] = $line;
            }
         }
         
         #-- unparsed header list (numeric indices)
         else {
            $ls[] = $line;
         }
      }

      #-- close TCP connection and give result
      fclose($f);
      return($ls);
   }
}


/**
 * @stub
 * list of already/potentially sent HTTP responsee headers(),
 * CANNOT be implemented (except for Apache module maybe)
 * 
 */
if (!function_exists("headers_list")) {
   function headers_list() {
      trigger_error("headers_list(): not supported by this PHP version", E_USER_WARNING);
      return (array)NULL;
   }
}


/**
 * write formatted string to stream/file,
 * arbitrary numer of arguments
 * 
 */
if (!function_exists("fprintf")) {
   function fprintf(/*...*/) {
      $args = func_get_args();
      $stream = array_shift($args);
      return fwrite($stream, call_user_func_array("sprintf", $args));
   }
}


/**
 * write formatted string to stream, args array
 * 
 */
if (!function_exists("vfprintf")) {
   function vfprintf($stream, $format, $args=NULL) {
      return fwrite($stream, vsprintf($format, $args));
   }
}


/**
 * splits a string in evenly sized chunks
 * 
 * @return array
 */
if (!function_exists("str_split")) {
   function str_split($str, $chunk=1) {
      $r = array();
      
      #-- return back as one chunk completely, if size chosen too low
      if ($chunk < 1) {
         $r[] = $str;
      }
      
      #-- add substrings to result array until subject strings end reached
      else {
         $len = strlen($str);
         for ($n=0; $n<$len; $n+=$chunk) {
            $r[] = substr($str, $n, $chunk);
         }
      }
      return($r);
   }
}


/**
 * constructs a QUERY_STRING (application/x-www-form-urlencoded format, non-raw)
 * from a nested array/hash with name=>value pairs
 * - only first two args are part of the original API - rest used for recursion
 *
 * @param  mixed  $vars           variable data for query string
 * @param  string $int_prefix     (optional)
 * @param  string $subarray_pfix  (optional)
 * @param integer $level  
 * @return mixed
 */
if (!function_exists("http_build_query")) {
   function http_build_query($vars, $int_prefix="", $subarray_pfix="", $level=0) {
   
      #-- empty starting string
      $s = "";
      ($SEP = ini_get("arg_separator.output")) or ($SEP = "&");
      
      #-- traverse hash/array/list entries 
      foreach ($vars as $index=>$value) {
         
         #-- add sub_prefix for subarrays (happens for recursed innovocation)
         if ($subarray_pfix) {
            if ($level) {
               $index = "[" . $index . "]";
            }
            $index =  $subarray_pfix . $index;
         }
         #-- add user-specified prefix for integer-indices
         elseif (is_int($index) && strlen($int_prefix)) {
            $index = $int_prefix . $index;
         }
         
         #-- recurse for sub-arrays
         if (is_array($value)) {
            $s .= http_build_query($value, "", $index, $level + 1);
         }
         else {   // or just literal URL parameter
            $s .= $SEP . $index . "=" . urlencode($value);
         }
      }
      
      #-- remove redundant "&" from first round (-not checked above to simplifiy loop)
      if (!$subarray_pfix) {
         $s = substr($s, strlen($SEP));
      }

      #-- return result / to previous array level and iteration
      return($s);
   }
}


/**
 * transform into 3to4 uuencode
 * - this is the bare encoding, not the uu file format
 * 
 * @param  string
 * @return string
 */
if (!function_exists("convert_uuencode")) {
   function convert_uuencode($bin) {

      #-- init vars
      $out = "";
      $line = "";
      $len = strlen($bin);
      $bin .= "\01\01\01";   // PHP and uuencode(1) use some special garbage??, looks like "\000"* and "`\n`" simply appended

      #-- canvass source string
      for ($n=0; $n<$len; ) {
      
         #-- make 24-bit integer from first three bytes
         $x = (ord($bin[$n++]) << 16)
            + (ord($bin[$n++]) <<  8)
            + (ord($bin[$n++]) <<  0);
            
         #-- disperse that into 4 ascii characters
         $line .= chr( 32 + (($x >> 18) & 0x3f) )
                . chr( 32 + (($x >> 12) & 0x3f) )
                . chr( 32 + (($x >>  6) & 0x3f) )
                . chr( 32 + (($x >>  0) & 0x3f) );
                
         #-- cut lines, inject count prefix before each
         if (($n % 45) == 0) {
            $out .= chr(32 + 45) . "$line\n";
            $line = "";
         }
      }

      #-- throw last line, +length prefix
      if ($trail = ($len % 45)) {
         $out .= chr(32 + $trail) . "$line\n";
      }

      // uuencode(5) doesn't tell so, but spaces are replaced with the ` char in most implementations
      $out = strtr("$out \n", " ", "`");
      return($out);
   }
}


/**
 * decodes uuencoded() data again
 *
 * @param  string $from  
 * @return string
 */
if (!function_exists("convert_uudecode")) {
   function convert_uudecode($from) {

      #-- prepare
      $out = "";
      $from = strtr($from, "`", " ");
      
      #-- go through lines
      foreach(explode("\n", ltrim($from)) as $line) {
         if (!strlen($line)) {
            break;  // end reached
         }
         
         #-- current line length prefix
         unset($num);
         $num = ord($line{0}) - 32;
         if (($num <= 0) || ($num > 62)) {  // 62 is the maximum line length
            break;          // according to uuencode(5), so we stop here too
         }
         $line = substr($line, 1);
         
         #-- prepare to decode 4-char chunks
         $add = "";
         for ($n=0; strlen($add)<$num; ) {
         
            #-- merge 24 bit integer from the 4 ascii characters (6 bit each)
            $x = ((ord($line[$n++]) - 32) << 18)
               + ((ord($line[$n++]) - 32) << 12)  // were saner with "& 0x3f"
               + ((ord($line[$n++]) - 32) <<  6)
               + ((ord($line[$n++]) - 32) <<  0);
               
            #-- reconstruct the 3 original data chars
            $add .= chr( ($x >> 16) & 0xff )
                  . chr( ($x >>  8) & 0xff )
                  . chr( ($x >>  0) & 0xff );
         }

         #-- cut any trailing garbage (last two decoded chars may be wrong)
         $out .= substr($add, 0, $num);
         $line = "";
      }

      return($out);
   }
}


/**
 * return array of filenames in a given directory
 * (only works for local files)
 *
 * @param  string $dirname  
 * @param  bool   $desc  
 * @return array
 */
if (!function_exists("scandir")) {
   function scandir($dirname, $desc=0) {
   
      #-- check for file:// protocol, others aren't handled
      if (strpos($dirname, "file://") === 0) {
         $dirname = substr($dirname, 7);
         if (strpos($dirname, "localh") === 0) {
            $dirname = substr($dirname, strpos($dirname, "/"));
         }
      }
      
      #-- directory reading handle
      if ($dh = opendir($dirname)) {
         $ls = array();
         while ($fn = readdir($dh)) {
            $ls[] = $fn;  // add to array
         }
         closedir($dh);
         
         #-- sort filenames
         if ($desc) {
            rsort($ls);
         }
         else {
            sort($ls);
         }
         return $ls;
      }

      #-- failure
      return false;
   }
}


/**
 * like date(), but returns an integer for given one-letter format parameter
 *
 * @param  string  $formatchar
 * @param  integer $timestamp
 * @return integer
 */
if (!function_exists("idate")) {
   function idate($formatchar, $timestamp=NULL) {
   
      #-- reject non-simple type parameters
      if (strlen($formatchar) != 1) {
         return false;
      }
      
      #-- get current time, if not given
      if (!isset($timestamp)) {
         $timestamp = time();
      }
      
      #-- get and turn into integer
      $str = date($formatchar, $timestamp);
      return (int)$str;
   }
}



/**
 * combined sleep() and usleep() 
 * 
 */
if (!function_exists("time_nanosleep")) {
   function time_nanosleep($sec, $nano) {
      sleep($sec);
      usleep($nano);
   }
}




/**
 * search first occourence of any of the given chars, returns rest of haystack
 * (char_list must be a string for compatibility with the real PHP func)
 *
 * @param  string $haystack  
 * @param  string $char_list  
 * @return integer
 */
if (!function_exists("strpbrk")) {
   function strpbrk($haystack, $char_list) {
   
      #-- prepare
      $len = strlen($char_list);
      $min = strlen($haystack);
      
      #-- check with every symbol from $char_list
      for ($n = 0; $n < $len; $n++) {
         $l = strpos($haystack, $char_list{$n});
         
         #-- get left-most occourence
         if (($l !== false) && ($l < $min)) {
            $min = $l;
         }
      }
      
      #-- result
      if ($min) {
         return(substr($haystack, $min));
      }
      else {
         return(false);
      }
   }
}



/**
 * logo image activation URL query strings (gaga feature)
 * 
 */
if (!function_exists("php_real_logo_guid")) {
   function php_real_logo_guid() { return php_logo_guid(); }
   function php_egg_logo_guid() { return zend_logo_guid(); }
}


/**
 * no need to implement this
 * (there aren't interfaces in PHP4 anyhow)
 * 
 */
if (!function_exists("get_declared_interfaces")) {
   function get_declared_interfaces() {
      trigger_error("get_declared_interfaces(): Current script won't run reliably with PHP4.", E_USER_WARNING);
      return( (array)NULL );
   }
}



/**
 * creates an array from lists of $keys and $values
 * (both should have same number of entries)
 *
 * @param  array $keys  
 * @param  array $values  
 * @return array
 */
if (!function_exists("array_combine")) {
   function array_combine($keys, $values) {
   
      #-- convert input arrays into lists
      $keys = array_values($keys);
      $values = array_values($values);
      $r = array();
      
      #-- one from each
      foreach ($values as $i=>$val) {
         if ($key = $keys[$i]) {
            $r[$key] = $val;
         }
         else {
            $r[] = $val;   // useless, PHP would have long aborted here
         }
      }
      return($r);
   }
}


/**
 * apply userfunction to each array element (descending recursively)
 * use it like:  array_walk_recursive($_POST, "stripslashes");
 * - $callback can be static function name or object/method, class/method
 *
 * @param  array  $input  
 * @param  string $callback  
 * @param  array  $userdata  (optional)
 * @return array
 */
if (!function_exists("array_walk_recursive")) {
   function array_walk_recursive(&$input, $callback, $userdata=NULL) {
      #-- each entry
      foreach ($input as $key=>$value) {

         #-- recurse for sub-arrays
         if (is_array($value)) {
            array_walk_recursive($input[$key], $callback, $userdata);
         }

         #-- $callback handles scalars
         else {
            call_user_func_array($callback, array(&$input[$key], $key, $userdata) );
         }
      }

      // no return value
   }
}


/**
 * complicated wrapper around substr() and and strncmp()
 *
 * @param  string  $haystack  
 * @param  string  $needle  
 * @param  integer $offset  
 * @param  integer $len  
 * @param  integer $ci  
 * @return mixed
 */
if (!function_exists("substr_compare")) {
   function substr_compare($haystack, $needle, $offset=0, $len=0, $ci=0) {

      #-- check params   
      if ($len <= 0) {   // not well documented
         $len = strlen($needle);
         if (!$len) { return(0); }
      }
      #-- length exception
      if ($len + $offset >= strlen($haystack)) {
         trigger_error("substr_compare: given length exceeds main_str", E_USER_WARNING);
         return(false);
      }

      #-- cut
      if ($offset) {
         $haystack = substr($haystack, $offset, $len);
      }
      #-- case-insensitivity
      if ($ci) {
         $haystack = strtolower($haystack);
         $needle = strtolower($needle);
      }

      #-- do
      return(strncmp($haystack, $needle, $len));
   }
}


/**
 * stub, returns empty list as usual;
 * you must load "ext/spl.php" beforehand to get this
 * 
 */
if (!function_exists("spl_classes")) {
   function spl_classes() {
      trigger_error("spl_classes(): not built into this PHP version");
      return (array)NULL;
   }
}



/**
 * gets you list of class names the given objects class was derived from, slow
 *
 * @param  object $obj  
 * @return object
 */
if (!function_exists("class_parents")) {
   function class_parents($obj) {
   
      #-- first get full list
      $all = get_declared_classes();
      $r = array();
      
      #-- filter out
      foreach ($all as $potential_parent) {
         if (is_subclass_of($obj, $potential_parent)) {
            $r[$potential_parent] = $potential_parent;
         }
      }
      return($r);
   }
}


/**
 * an alias
 * 
 */
if (!function_exists("session_commit") && function_exists("session_write_close")) {
   function session_commit() {
      // simple
      session_write_close();
   }
}


/**
 * aliases
 *
 * @param  mixed $host  
 * @param  mixed $type  (optional)
 * @return mixed
 */
if (!function_exists("dns_check_record")) {
   function dns_check_record($host, $type=NULL) {
      // synonym to
      return checkdnsrr($host, $type);
   }
}
if (!function_exists("dns_get_mx")) {
   function dns_get_mx($host, $mx) {
      $args = func_get_args();
      // simple alias - except the optional, but referenced third parameter
      if ($args[2]) {
         $w = & $args[2];
      }
      else {
         $w = false;
      }
      return getmxrr($host, $mx, $w);
   }
}


/**
 * setrawcookie(),
 * can this be emulated 100% exactly?
 *
 * @param  string $name 
 * @param  mixed  $value
 * @param  mixed  $expire
 * @param  mixed  $path
 * @param  mixed  $domain
 * @param integer $secure
 * @return string
 */
if (!function_exists("setrawcookie")) {
   // we output everything directly as HTTP header(), PHP doesn't seem
   // to manage an internal cookie list anyhow
   function setrawcookie($name, $value=NULL, $expire=NULL, $path=NULL, $domain=NULL, $secure=0) {
      if (isset($value) && strpbrk($value, ",; \r\t\n\f\014\013")) {
         trigger_error("setrawcookie: value may not contain any of ',; \r\n' and some other control chars; thrown away", E_USER_WARNING);
      }
      else {
         $h = "Set-Cookie: $name=$value"
            . ($expire ? "; expires=" . gmstrftime("%a, %d-%b-%y %H:%M:%S %Z", $expire) : "")
            . ($path ? "; path=$path": "")
            . ($domain ? "; domain=$domain" : "")
            . ($secure ? "; secure" : "");
         header($h);
      }
   }
}


/**
 * write-at-once file access (counterpart to file_get_contents)
 *
 * @param  integer $filename
 * @param  mixed   $content  
 * @param  integer $flags 
 * @param  mixed   $resource
 * @return integer
 */
if (!function_exists("file_put_contents")) {
   function file_put_contents($filename, $content, $flags=0, $resource=NULL) {

      #-- prepare
      $mode = ($flags & FILE_APPEND ? "a" : "w" ) ."b";
      $incl = $flags & FILE_USE_INCLUDE_PATH;
      $length = strlen($content);
//      $resource && trigger_error("EMULATED file_put_contents does not support \$resource parameter.", E_USER_ERROR);
      
      #-- write non-scalar?
      if (is_array($content) || is_object($content)) {
         $content = implode("", (array)$content);
      }

      #-- open for writing
      $f = fopen($filename, $mode, $incl);
      if ($f) {
      
         // locking
         if (($flags & LOCK_EX) && !flock($f, LOCK_EX)) {
            return fclose($f) && false;
         }

         // write
         $written = fwrite($f, $content);
         fclose($f);
         
         #-- only report success, if completely saved
         return($length == $written);
      }
   }
}


/**
 * file-related constants
 *
 */
if (!defined("FILE_USE_INCLUDE_PATH")) { define("FILE_USE_INCLUDE_PATH", 1); }
if (!defined("FILE_IGNORE_NEW_LINES")) { define("FILE_IGNORE_NEW_LINES", 2); }
if (!defined("FILE_SKIP_EMPTY_LINES")) { define("FILE_SKIP_EMPTY_LINES", 4); }
if (!defined("FILE_APPEND")) { define("FILE_APPEND", 8); }
if (!defined("FILE_NO_DEFAULT_CONTEXT")) { define("FILE_NO_DEFAULT_CONTEXT", 16); }



#-- more new constants for 5.0
/**
 * @since PHP 5
 */
if (!defined("E_STRICT")) { define("E_STRICT", 2048); }  // _STRICT is a special case of _NOTICE (_DEBUG)
# PHP_CONFIG_FILE_SCAN_DIR




#-- array count_recursive()
if (!defined("COUNT_NORMAL")) { define("COUNT_NORMAL", 0); }      // count($array, 0);
if (!defined("COUNT_RECURSIVE")) { define("COUNT_RECURSIVE", 1); }    // use count_recursive()



/**
 * @since never
 * @nonstandard
 * 
 * we introduce a new function, because we cannot emulate the
 * newly introduced second parameter to count()
 * 
 * @param  array $array 
 * @param  integer $mode
 * @return integer
 */
if (!function_exists("count_recursive")) {
   function count_recursive($array, $mode=1) {
      if (!$mode) {
         return(count($array));
      }
      else {
         $c = count($array);
         foreach ($array as $sub) {
            if (is_array($sub)) {
               $c += count_recursive($sub);
            }
         }
         return($c);
      }
   }
}



/**
 * Sets the default client character set.
 *
 * @compat
 *    Procedural style
 * @bugs
 *    PHP documentation says this function exists in PHP 5 >= 5.0.5,
 *    but it also depends on the versions of external libraries, e.g.,
 *    php_mysqli.dll and libmysql.dll.
 *
 * @param $link    mysqli MySQLi connection resource
 * @param $charset string Character set
 * @return bool           TRUE on success, FALSE on failure
 */
if (!function_exists("mysqli_set_charset") && function_exists("mysqli_query")) {
   function mysqli_set_charset($link, $charset) {
      return mysqli_query($link, "SET NAMES '$charset'");
   }
}









/**
 *                                   ------------------------------ 4.4 ---
 * @group 4_4
 * @since 4.4
 *
 * PHP 4.4 is a bugfix and backporting version created after PHP 5. It went
 * mostly unchanged, but changes a few language semantics (e.g. references).
 *
 * @emulated
 *    PHP_INT_SIZE
 *    PHP_INT_MAX
 *    SORT_LOCALE_STRING
 *
 */

if (!defined("PHP_INT_SIZE")) { define("PHP_INT_SIZE", 4); }
if (!defined("PHP_INT_MAX")) { define("PHP_INT_MAX", 2147483647); }
if (!defined("SORT_LOCALE_STRING")) { define("SORT_LOCALE_STRING", 5); }






/**
 *                                   ------------------------------ 4.3 ---
 * @group 4_3
 * @since 4.3
 *
 *  Additions in 4.3 version of PHP interpreter.
 *
 * @emulated
 *    file_get_contents
 *    array_key_exists
 *    array_intersect_assoc
 *    array_diff_assoc
 *    html_entity_decode
 *    str_word_count
 *    str_shuffle
 *    get_include_path
 *    set_include_path
 *    restore_include_path
 *    fnmatch
 *    FNM_PATHNAME
 *    FNM_NOESCAPE
 *    FNM_PERIOD
 *    FNM_LEADING_DIR
 *    FNM_CASEFOLD
 *    FNM_EXTMATCH
 *    glob
 *    GLOB_MARK
 *    GLOB_NOSORT
 *    GLOB_NOCHECK
 *    GLOB_NOESCAPE
 *    GLOB_BRACE
 *    GLOB_ONLYDIR
 *    GLOB_NOCASE
 *    GLOB_DOTS
 *    __FUNCTION__
 *    PATH_SEPARATOR
 *    PHP_SHLIB_SUFFIX
 *    PHP_SAPI
 *    PHP_PREFIX
 *
 * @missing
 *    sha1_file
 *    sha1 - too much code, and has been reimplemented elsewhere
 *
 * @unimplementable
 *    money_format
 *
 */


/**
 * simplified file read-at-once function
 *
 * @param  string  $filename  
 * @param  integer $use_include_path  (optional)
 * @return string
 */
if (!function_exists("file_get_contents")) {
   function file_get_contents($filename, $use_include_path=1) {

      #-- open file, let fopen() report error
      $f = fopen($filename, "rb", $use_include_path);
      if (!$f) { return; }

      #-- read max 2MB
      $content = fread($f, 1<<21);
      fclose($f);
      return($content);
   }
}



/**
 * shell-like filename matching (* and ? globbing characters)
 *
 * @param  string $pattern  glob-pattern with *s and ?s
 * @param  string $fn       filename to match it against (without path)
 * @param integer $flags    (optional)
 * @return bool
 */
if (!function_exists("fnmatch")) {

   #-- associated constants
   if (!defined("FNM_PATHNAME")) { define("FNM_PATHNAME", 1<<0); }  // no wildcard ever matches a "/"
   if (!defined("FNM_NOESCAPE")) { define("FNM_NOESCAPE", 1<<1); }  // backslash can't escape meta chars
   if (!defined("FNM_PERIOD")) { define("FNM_PERIOD",   1<<2); }  // leading dot must be given explicit
   if (!defined("FNM_LEADING_DIR")) { define("FNM_LEADING_DIR", 1<<3); }  // not in PHP
   if (!defined("FNM_CASEFOLD")) { define("FNM_CASEFOLD", 0x50); }  // match case-insensitive
   if (!defined("FNM_EXTMATCH")) { define("FNM_EXTMATCH", 1<<5); }  // not in PHP
   
   #-- implementation
   function fnmatch($pattern, $fn, $flags=0x0000) {
      
      #-- 'hidden' files
      if ($flags & FNM_PERIOD) {
         if (($fn[0] == ".") && ($pattern[0] != ".")) {
            return(false);    // abort early
         }
      }

      #-- case-insensitivity
      $rxci = "";
      if ($flags & FNM_CASEFOLD) {
         $rxci = "i";
      }
      #-- handline of pathname separators (/)
      $wild = ".";
      if ($flags & FNM_PATHNAME) {
         $wild = "[^/".DIRECTORY_SEPARATOR.DIRECTORY_SEPARATOR."]";
      }

      #-- check for cached regular expressions
      static $cmp = array();
      if (isset($cmp["$pattern+$flags"])) {
         $rx = $cmp["$pattern+$flags"];
      }

      #-- convert filename globs into regex
      else {
         $rx = preg_quote($pattern);
         $rx = strtr($rx, array(
            "\\*"=>"$wild*?", "\\?"=>"$wild", "\\["=>"[", "\\]"=>"]",
         ));
         $rx = "{^" . $rx . "$}" . $rxci;
         
         #-- cache
         if (count($cmp) >= 50) {
            $cmp = array();   // free
         }
         $cmp["$pattern+$flags"] = $rx;
      }
      
      #-- compare
      return(preg_match($rx, $fn));
   }
}


/**
 * file search and name matching (with shell patterns)
 *
 * @param  string  $pattern   search pattern and path ../* string
 * @param  integer $flags (optional)
 * @return array
 */
if (!function_exists("glob")) {

   #-- introduced constants
   if (!defined("GLOB_MARK")) { define("GLOB_MARK", 1<<0); }
   if (!defined("GLOB_NOSORT")) { define("GLOB_NOSORT", 1<<1); }
   if (!defined("GLOB_NOCHECK")) { define("GLOB_NOCHECK", 1<<2); }
   if (!defined("GLOB_NOESCAPE")) { define("GLOB_NOESCAPE", 1<<3); }
   if (!defined("GLOB_BRACE")) { define("GLOB_BRACE", 1<<4); }
   if (!defined("GLOB_ONLYDIR")) { define("GLOB_ONLYDIR", 1<<5); }
   if (!defined("GLOB_NOCASE")) { define("GLOB_NOCASE", 1<<6); }
   if (!defined("GLOB_DOTS")) { define("GLOB_DOTS", 1<<7); }
   // unlikely to work under Win(?), without replacing the explode() with
   // a preg_split() incorporating the native DIRECTORY_SEPARATOR as well

   #-- implementation
   function glob($pattern, $flags=0x0000) {
      $ls = array();
      $rxci = ($flags & GLOB_NOCASE) ? "i" : "";
#echo "\n=> glob($pattern)...\n";
      
      #-- transform glob pattern into regular expression
      #   (similar to fnmatch() but still different enough to require a second func)
      if ($pattern) {

         #-- look at each directory/fn spec part separately
         $parts2 = explode("/", $pattern);
         $pat = preg_quote($pattern);
         $pat = strtr($pat, array("\\*"=>".*?", "\\?"=>".?"));
         if ($flags ^ GLOB_NOESCAPE) {
            // uh, oh, ouuch - the above is unclean enough...
         }
         if ($flags ^ GLOB_BRACE) {
            $pat = preg_replace_callback("/\{(.+?)\}/", "glob___rx_brace", $pat);
         }
         $parts = explode("/", $pat);
#echo "parts == ".implode(" // ", $parts) . "\n";
         $lasti = count($parts) - 1;
         $dn = "";
         foreach ($parts as $i=>$p) {

            #-- basedir included (yet no pattern matching necessary)
            if (!strpos($p, "*?") && (strpos($p, ".?")===false)) {
               $dn .= $parts2[$i] . ($i!=$lasti ? "/" : "");
#echo "skip:$i, cause no pattern matching char found -> only a basedir spec\n";
               continue;
            }
            
            #-- start reading dir + match filenames against current pattern
            if ($dh = opendir($dn ?$dn:'.')) {
               $with_dot = ($p[1]==".") || ($flags & GLOB_DOTS);
#echo "part:$i:$p\n";
#echo "reading dir \"$dn\"\n";
               while ($fn = readdir($dh)) {
                  if (preg_match("\007^$p$\007$rxci", $fn)) {

                     #-- skip over 'hidden' files
                     if (($fn[0] == ".") && !$with_dot) {
                        continue;
                     }

                     #-- add filename only if last glob/pattern part
                     if ($i==$lasti) {
                        if (is_dir("$dn$fn")) {
                           if ($flags & GLOB_ONLYDIR) {
                              continue;
                           }
                           if ($flags & GLOB_MARK) {
                              $fn .= "/";
                           }
                        }
#echo "adding '$fn' for dn=$dn to list\n";
                        $ls[] = "$dn$fn";
                     }

                     #-- initiate a subsearch, merge result list in
                     elseif (is_dir("$dn$fn")) {
                        // add reamaining search patterns to current basedir
                        $remaind = implode("/", array_slice($parts2, $i+1));
                        $ls = array_merge($ls, glob("$dn$fn/$remaind", $flags));
                     }
                  }
               }
               closedir($dh);

               #-- prevent scanning a 2nd part/dir in same glob() instance:
               break;  
            }

            #-- given dirname doesn't exist
            else {
               return($ls);
            }

         }// foreach $parts
      }

      #-- return result list
      if (!$ls && ($flags & GLOB_NOCHECK)) {
         $ls[] = $pattern;
      }
      if ($flags ^ GLOB_NOSORT) {
         sort($ls);
      }
#print_r($ls);
#echo "<=\n";
      return($ls);
   }
   function glob___rx_brace($m) {
      return "(?:" . strtr($m[1], ",", "|") . ")";
   }
} //@FIX: fully comment, remove debugging code (- as soon as it works ;)



/**
 * redundant alias for isset()
 * 
 */
if (!function_exists("array_key_exists")) {
   function array_key_exists($key, $search) {
      return isset($search[$key]);
   }
}


/**
 * who could need that?
 * 
 */
if (!function_exists("array_intersect_assoc")) {
   function array_intersect_assoc( /*array, array, array...*/ ) {

      #-- parameters, prepare
      $in = func_get_args();
      $cmax = count($in);
      $whatsleftover = array();
      
      #-- walk through each array pair
      #   (take first as checklist)
      foreach ($in[0] as $i => $v) {
         for ($c = 1; $c < $cmax; $c++) {
            #-- remove entry, as soon as it isn't present
            #   in one of the other arrays
            if (!isset($in[$c][$i]) || (@$in[$c][$i] !== $v)) {
               continue 2;
            }
         }
         #-- it was found in all other arrays
         $whatsleftover[$i] = $v;
      }
      return $whatsleftover;
   }
}


/**
 * the opposite of the above
 * 
 */
if (!function_exists("array_diff_assoc")) {
   function array_diff_assoc( /*array, array, array...*/ ) {

      #-- params
      $in = func_get_args();
      $diff = array();
      
      #-- compare each array with primary/first
      foreach ($in[0] as $i=>$v) {
         for ($c=1; $c<count($in); $c++) {
            #-- skip as soon as it matches with entry in another array
            if (isset($in[$c][$i]) && ($in[$c][$i] == $v)) {
               continue 2;
            }
         }
         #-- else
         $diff[$i] = $v;
      }
      return $diff;
   }
}


/**
 * opposite of htmlentities
 * 
 */
if (!function_exists("html_entity_decode")) {
   function html_entity_decode($string, $quote_style=ENT_COMPAT, $charset="ISO-8859-1") {
      //@FIX: we fall short on anything other than Latin-1
      $y = array_flip(get_html_translation_table(HTML_ENTITIES, $quote_style));
      return strtr($string, $y);
   }
}


/**
 * extracts single words from a string
 * 
 */
if (!function_exists("str_word_count")) {
   function str_word_count($string, $result=0) {
   
      #-- let someone else do the work
      preg_match_all('/([\w](?:[-\'\w]?[\w]+)*)/', $string, $uu);

      #-- return full word list
      if ($result == 1) {
         return($uu[1]);
      }
      
      #-- array() of $pos=>$word entries
      elseif ($result >= 2) {
         $r = array();
         $l = 0;
         foreach ($uu[1] as $word) {
            $l = strpos($string, $word, $l);
            $r[$l] = $word;
            $l += strlen($word);  // speed up next search
         }
         return($r);
      }

      #-- only count
      else {
         return(count($uu[1]));
      }
   }
}


/**
 * creates a permutation of the given strings characters
 * (let's hope the random number generator was alread initialized)
 * 
 */
if (!function_exists("str_shuffle")) {
   function str_shuffle($str) {
      $r = "";

      #-- cut string down with every iteration
      while (strlen($str)) {
         $n = strlen($str) - 1;
         if ($n) {
            $n = rand(0, $n);   // glibcs` rand is ok since 2.1 at least
         }
         
         #-- cut out elected char, add to result string
         $r .= $str{$n};
         $str = substr($str, 0, $n) . substr($str, $n + 1);
      }
      return($r);
   }
}


/**
 * simple shorthands
 * 
 */
if (!function_exists("get_include_path")) {
   function get_include_path() {
      return(get_cfg_var("include_path"));
   }
   function set_include_path($new) {
      return ini_set("include_path", $new);
   }
   function restore_include_path() {
      ini_restore("include_path");
   }
}


#-- constants for 4.3
   if (!defined("PATH_SEPARATOR")) { define("PATH_SEPARATOR", ((DIRECTORY_SEPARATOR=='\\') ? ';' :':')); }
   if (!defined("PHP_SHLIB_SUFFIX")) { define("PHP_SHLIB_SUFFIX", ((DIRECTORY_SEPARATOR=='\\') ? 'dll' :'so')); }
   if (!defined("PHP_SAPI")) { define("PHP_SAPI", php_sapi_name()); }
   if (!defined("__FUNCTION__")) { define("__FUNCTION__", NULL); }   // empty string would signalize main()


#-- not identical to what PHP reports (it seems to `which` for itself)
if (!defined("PHP_PREFIX") && isset($_ENV["_"])) { define("PHP_PREFIX", substr($_ENV["_"], 0, strpos($_ENV["_"], "bin/"))); }






/**
 *                                   ------------------------------ 4.2 ---
 * @group 4_2
 * @since 4.2
 *
 *
 *  Functions added in PHP 4.2 interpreters.
 *
 *
 * @emulated
 *   str_rot13
 *   array_change_key_case
 *   array_fill
 *   array_chunk
 *   md5_file
 *   is_a
 *   fmod
 *   floatval
 *   is_infinite
 *   is_nan
 *   is_finite
 *   var_export
 *   strcoll
 * @missing
 *   ...
 *
 *   almost complete!?
 *
 *
 */


/**
 * shy away from this function - it was broken in all PHP4.2 releases,
 * and our emulation here won't change that
 *
 * @param  string $str  
 * @return string
 */
if (!function_exists("str_rot13")) {
   function str_rot13($str) {
      static $from = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
      static $to = "NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm";
      return strtr($str, $from, $to);
   }
}


/**
 * changes case of textual index keys
 *
 * @param  array $array  
 * @param  int   $case
 * @return array
 */
if (!function_exists("array_change_key_case")) {
   
   #-- introduced constants
   if (!defined("CASE_LOWER")) { define("CASE_LOWER", 0); }
   if (!defined("CASE_UPPER")) { define("CASE_UPPER", 1); }
   
   #-- implementation
   function array_change_key_case($array, $case=CASE_LOWER) {
   
      #-- loop through
      foreach ($array as $i=>$v) {
         #-- do anything for strings only
         if (is_string($i)) {
            unset($array[$i]);
            $i = ($case==CASE_LOWER) ? strtolower($i) : strtoupper($i);
            $array[$i] = $v;
         }
         // non-recursive      
      }
      return($array);
   }
}


/**
 * create fixed-length array made up of $value data
 * 
 */
if (!function_exists("array_fill")) {
   function array_fill($start_index, $num, $value) {

      #-- params
      $r = array();
      $i = $start_index;
      $end = $num + $start_index;
      
      #-- append
      for (; $i < $end; $i++)
      {
         $r[$i] = $value;
      }
      return($r);
   }
}


/**
 * split an array into evenly sized parts
 * 
 */
if (!function_exists("array_chunk")) {
   function array_chunk($input, $size, $preserve_keys=false) {
   
      #-- array for chunked output
      $r = array();
      $n = -1;  // chunk index
      
      #-- enum input array blocks
      foreach ($input as $i=>$v) {
      
         #-- new chunk
         if (($n < 0) || (count($r[$n]) == $size)) {
            $n++;
            $r[$n] = array();
         }
         
         #-- add input value into current [$n] chunk
         if ($preserve_keys) {
            $r[$n][$i] = $v;
         }
         else {
            $r[$n][] = $v;
         }
      }
      return($r);
   }
}


/**
 * convenience wrapper
 * 
 */
if (!function_exists("md5_file")) {
   function md5_file($filename, $raw_output=false) {

      #-- read file, apply hash function
      $r = md5(file_get_contents($filename, "rb"));
         
      #-- transform? and return
      if ($raw_output) {
         $r = pack("H*", $r);
      }
      return $r;
   }
}


/**
 * object type checking
 * 
 */
if (!function_exists("is_a")) {
   function is_a($obj, $classname) {
   
      #-- lowercase everything for comparison
      $classnaqme = strtolower($classname);
      $obj_class =  strtolower(get_class($obj));
      
      #-- two possible checks
      return ($obj_class == $classname) or is_subclass_of($obj, $classname);
   }
}


/**
 * floating point modulo
 * 
 */
if (!function_exists("fmod")) {
   function fmod($x, $y) {
      $r = $x / $y;
      $r -= (int)$r;
      $r *= $y;
      return($r);
   }
}


/**
 * makes float variable from string
 *
 * @param  string
 * @return float
 */
if (!function_exists("floatval")) {
   function floatval($str) {
      $str = ltrim($str);
      return (float)$str;
   }
}


/**
 * floats
 *
 */
if (!function_exists("is_infinite")) {

   #-- constants as-is
   if (!defined("NAN")) { define("NAN", "NAN"); }
   if (!defined("INF")) { define("INF", "INF"); }   // there is also "-INF"
   
   #-- simple checks
   function is_infinite($f) {
      $s = (string)$f;
      return(  ($s=="INF") || ($s=="-INF")  );
   }
   function is_nan($f) {
      $s = (string)$f;
      return(  $s=="NAN"  );
   }
   function is_finite($f) {
      $s = (string)$f;
      return(  !strpos($s, "N")  );
   }
}


/**
 * throws value-instantiation PHP-code for given variable
 *
 * @compat
 *    output differentiates from native PHP version,
 *    but functions identically
 *
 * @param  mixed $var  
 * @param  mixed $return  (optional) false
 * @param  string $indent  (optional) ""
 * @param  string $output  (optional) ""
 * @return mixed
 */
if (!function_exists("var_export")) {
   function var_export($var, $return=false, $indent="", $output="") {

      #-- output as in-class variable definitions
      if (is_object($var)) {
         $output = get_class($var) . "::_set_state(array(\n";
         foreach (((array)$var) as $id=>$var) {
            $output .= "  '\$$id' => " . var_export($var, true) . ",\n";
         }
         $output .= "));";
      }
      
      #-- array constructor
      elseif (is_array($var)) {
         foreach ($var as $id=>$next) {
            if ($output) $output .= ",\n";
                    else $output = "array(\n";
            $output .= $indent . '  '
                    . (is_numeric($id) ? $id : '"'.addslashes($id).'"')
                    . ' => ' . var_export($next, true, "$indent  ");
         }
         if (empty($output)) $output = "array(";
         $output .= "\n{$indent})";
       #if ($indent == "") $output .= ";";
      }
      
      #-- literals
      elseif (is_numeric($var)) {
         $output = "$var";
      }
      elseif (is_bool($var)) {
         $output = $var ? "true" : "false";
      }
      else {
         $output = "'" . preg_replace("/([\\\\\'])/", '\\\\$1', $var) . "'";
      }

      #-- done
      if ($return) {
         return($output);
      }
      else {
         print($output);
      }
   }
}


/**
 * @stub
 * @since existed since PHP 4.0.5, but under Win32 first since 4.3.2
 * 
 * strcmp() variant that respects locale setting,
 *
 * @param  string $str1  
 * @param  string $str2  
 * @return string
 */
if (!function_exists("strcoll")) {
   function strcoll($str1, $str2) {
      return strcmp($str1, $str2);
   }
}





/**
 *                                   ------------------------------ 4.1 ---
 * @group 4_1
 * @since 4.1
 *
 *
 * See also "ext/math41.php" for some more (rarely used mathematical funcs).
 *
 *
 * @emulated
 *   diskfreespace
 *   disktotalspace
 *   vprintf
 *   vsprintf
 *   import_request_variables
 *   hypot
 *   log1p
 *   expm1
 *   sinh
 *   cosh
 *   tanh
 *   asinh
 *   acosh
 *   atanh
 *   mhash
 *   mhash_count
 *   mhash_get_hash_name
 *   mhash_get_block_size
 * @missing
 *   nl_langinfo - unimpl?
 *   getmygid
 *   version_compare
 *
 */




/**
 * aliases (an earlier fallen attempt to unify PHP function names)
 * 
 */
if (!function_exists("diskfreespace")) {
   function diskfreespace() {
      return disk_free_sapce();
   }
   function disktotalspace() {
      return disk_total_sapce();
   }
}


/**
 * variable count of arguments (in array list) printf variant
 *
 * @param  string $format  
 * @param  mixed  $args
 * @output
 */
if (!function_exists("vprintf")) {
   function vprintf($format, $args=NULL) {
      call_user_func_array("fprintf", func_get_args());
   }
}


/**
 * same as above, but doesn't output directly and returns formatted string
 *
 * @param  string $format
 * @param  mixed  $args
 * @return string
 */
if (!function_exists("vsprintf")) {
   function vsprintf($format, $args=NULL) {
      $args = array_merge(array($format), array_values((array)$args));
      return call_user_func_array("sprintf", $args);
   }
}


/**
 * @extended
 *
 * can be used to simulate a register_globals=on environment
 *
 * @param  string $types   order of GET,POST,COOKIE variables
 * @param  string $pfix    prefix for imported variable names
 * @global $GLOBALS
 */
if (!function_exists("import_request_variables")) {
   function import_request_variables($types="GPC", $pfix="") {
      
      #-- associate abbreviations to global var names
      $alias = array(
         "G" => "_GET",
         "P" => "_POST",
         "C" => "_COOKIE",
         "S" => "_SERVER",   // non-standard
         "E" => "_ENV",      // non-standard
      );

      #-- alias long names (PHP < 4.0.6)    //@FIXME: does that belong here?
      if (!isset($_REQUEST)) {
         $_GET = & $HTTP_GET_VARS;
         $_POST = & $HTTP_POST_VARS;
         $_COOKIE = & $HTTP_COOKIE_VARS;
      }
      
      #-- copy
      foreach (str_split($types, 1) as $c) {
         if ($FROM = $alias[strtoupper($c)]) {
            foreach ($$FROM as $key=>$val) {
               if (!isset($GLOBALS[$pfix.$key])) {
                  $GLOBALS[$pfix . $key] = $val;
               }
            }
         }
      }
      // done
   }
}


// a few mathematical functions follow
// (wether we should really emulate them is a different question)

#-- me has no idea what this function means
if (!function_exists("hypot")) {
   function hypot($num1, $num2) {
      return sqrt($num1*$num1 + $num2*$num2);  // as per PHP manual ;)
   }
}

#-- more accurate logarithm func, but we cannot simulate it
#   (too much work, too slow in PHP)
if (!function_exists("log1p")) {
   function log1p($x) {
      return(  log(1+$x)  );
   }
   #-- same story for:
   function expm1($x) {
      return(  exp($x)-1  );
   }
}

#-- as per PHP manual
if (!function_exists("sinh")) {
   function sinh($f) {
      return(  (exp($f) - exp(-$f)) / 2  );
   }
   function cosh($f) {
      return(  (exp($f) + exp(-$f)) / 2  );
   }
   function tanh($f) {
      return(  sinh($f) / cosh($f)  );   // ok, that one makes sense again :)
   }
}

#-- these look a bit more complicated
if (!function_exists("asinh")) {
   function asinh($x) {
      return(  log($x + sqrt($x*$x+1))  );
   }
   function acosh($x) {
      return(  log($x + sqrt($x*$x-1))  );
   }
   function atanh($x) {
      return(  log1p( 2*$x / (1-$x) ) / 2  );
   }
}




/**
 * HMAC from RFC2104, but see also PHP_Compat or Crypt_HMAC
 *
 * @param  string $hashtype  which encoding functions to use
 * @param  string $text      plaintext to hash
 * @param  string $key       key data
 * @return string            hash
 */
if (!function_exists("mhash")) {

   #-- constants
   if (!defined("MHASH_CRC32")) { define("MHASH_CRC32", 0); }
   if (!defined("MHASH_MD5")) { define("MHASH_MD5", 1); }       // RFC1321
   if (!defined("MHASH_SHA1")) { define("MHASH_SHA1", 2); }      // RFC3174
   if (!defined("MHASH_TIGER")) { define("MHASH_TIGER", 7); }
   if (!defined("MHASH_MD4")) { define("MHASH_MD4", 16); }      // RFC1320
   if (!defined("MHASH_SHA256")) { define("MHASH_SHA256", 17); }
   if (!defined("MHASH_ADLER32")) { define("MHASH_ADLER32", 18); }
   
   #-- implementation
   function mhash($hashtype, $text, $key) {
   
      #-- hash function
      if (!($func = mhash_get_hash_name($hashtype)) || !function_exists($func)) {
         return trigger_error("mhash: cannot use hash algorithm #$hashtype/$func", E_USER_ERROR);
      }
      if (!$key) {
         trigger_error("mhash: called without key", E_USER_WARNING);
      }
      
      #-- params
      $bsize = mhash_get_block_size($hashtype);   // fixed size, 64

      #-- pad key
      if (strlen($key) > $bsize) {  // hash key, when it's too long
         $key = $func($key); 
         $key = pack("H*", $key);   // binarify
      }
      $key = str_pad($key, $bsize, "\0");  // fill up with NULs (1)
      
      #-- prepare inner and outer padding stream
      $ipad = str_pad("", $bsize, "6");   // %36
      $opad = str_pad("", $bsize, "\\");  // %5C
      
      #-- call hash func    // php can XOR strings for us
      $dgst = pack("H*",  $func(  ($key ^ $ipad)  .  $text  ));  // (2,3,4)
      $dgst = pack("H*",  $func(  ($key ^ $opad)  .  $dgst  ));  // (5,6,7)
      return($dgst);
   }
   
   #-- return which hash functions are implemented
   function mhash_count() {
      return(MHASH_SHA1);
   }
   
   #-- map numeric identifier to hash function name
   function mhash_get_hash_name($i) {
      static $hash_funcs = array(
          MHASH_CRC32 => "crc32",   // would need dechex()ing in main func?
          MHASH_MD5 => "md5",
          MHASH_SHA1 => "sha1",
      );
      return(strtoupper($hash_funcs[$i]));
   }
   
   #-- static value
   function mhash_get_block_size($i) {
      return(64);
   }
}





/**
 *
 * @group REMOVED_STUFF
 * @since unknown
 * @until unknown
 *
 *
 * @emulated
 *    ...
 *
 * @missing
 *    leak  - occupy a given amount of memory
 *
 */





/**
 *
 * group PRE_4_1
 * since 4.0
 * since 3.0
 *
 *
 * @emulated
 *    ...
 *
 *
 * No need to implement anything below that, because such old versions
 * will be incompatbile anyhow (- none of the newer superglobals known).
 *
 * but see also "ext/old"
 *
 */


?>







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1765
1766
1767
1768
1769
1770
1771







1772
1773
1774
1775






























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































1776
1777


1778




































































































































































































































1779
1780








































































































































































































































































































































































































































































































1781
1782
1783
1784
1785
}













/**
 *                                   ----------------------------- 5.0 ---
 * @group 5_0
 * @since 5.0






























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































 * @moved ext/php50.php
 *


 *




































































































































































































































 * Now even the 5.1 compatibility code is seriously redundant in 2015,
 * so the 4.1 till 5.0 have been extracted out into ext/php50.php








































































































































































































































































































































































































































































































 *
 */


?>