ChangeLog
---------

v18
  - Anthon Pang contributed mysqli_set_charset() and E_DEPRECATED const
  - Also contrib/safe_serialize and unserialize() implementations by Anthon
  - TMPDIR support for sys_get_temp_dir()
  - gzdecode is now an official PHP 5.4 function.
  - hex2bin
  - session_status
  - zlib_encode / zlib_decode
  - http_redirect, http_response_code, http_send_content_type
  - get_declared_traits (stub), class_uses (stub), get_declared_traits (stub)
  - json_encode: JSON_HEX_AMP, JSON_HEX_TAG, JSON_HEX_APOS, JSON_HEX_QUOT,
    (5.3.3 addition) JSON_NUMERIC_CHECK,
    (5.4.0 addition) JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES
    and JSON_UNESCAPED_UNICODE.
  - json_decode: added flag JSON_BIGINT_AS_STRING, JSON_OBJECT_AS_ARRAY,
    and the non-standard JSON_PARSE_JAVASCRIPT
  - basic basic json_last_error() function

v17
  - new emulation of pspell extension using cmdline tool
  - escaping fixed in json_encode(), ignores utf-8 now
  - a few php 5.2 array functions added
  - str_getcsv, parse_ini_string, quoted_printable_encode
  - inet_pton, inet_ntop, 

#!/bin/sh

echo "generate test-up.php, with if function_exists() removed, all emulations prefixed by up_"

egrep -v '^if [(]!function_exists|^[}]' upgrade.php \
    | perl -pe 'if (/^   function ([\w_\d]+)/) { $save = $1; }; if ($save) { s/$save/up_$save/m; }' \
    > upgrade.php.prefixed

 *                                   -------------------------- FUTURE ---
 * @group SVN
 * @since future
 *
 * Following functions aren't implemented in current PHP versions, but
 * might already be in CVS/SVN.
 *
 * @removed
 *    setcookie2
 *
 */



/**
 *                                   ------------------------ OVERRIDE ---
 *
 */
if (defined("UPGRADEPHP_OVERRIDE") and function_exists("runkit_function_remove")) {
   ini_set("runkit.internal_override", 1);
   runkit_function_rename("json_encode", "php::json_encode");
   runkit_function_rename("json_decode", "php::json_encode");
 }



/**
 *                                   ----------------------------- 5.4 ---
 * @group 5_4
 * @since 5.4

 */
if (!defined("JSON_HEX_TAG")) {
   define("JSON_HEX_TAG", 1);
   define("JSON_HEX_AMP", 2);
   define("JSON_HEX_APOS", 4);
   define("JSON_HEX_QUOT", 8);
   define("JSON_FORCE_OBJECT", 16);
 }
if (!defined("JSON_NUMERIC_CHECK")) {
   define("JSON_NUMERIC_CHECK", 32);      // 5.3.3
 }
if (!defined("JSON_UNESCAPED_SLASHES")) {
   define("JSON_UNESCAPED_SLASHES", 64);  // 5.4.0
   define("JSON_PRETTY_PRINT", 128);      // 5.4.0
   define("JSON_UNESCAPED_UNICODE", 256); // 5.4.0
 }
if (!function_exists("json_encode")) {
   function json_encode($var, $options=0, $_indent="") {

      #-- prepare JSON string
      $obj = ($options & JSON_FORCE_OBJECT);
      list($_space, $_tab, $_nl) = ($options & JSON_PRETTY_PRINT) ? array(" ", "    $_indent", "\n") : array("", "", "");
      $json = "$_indent";

             "<"  => $options & JSON_HEX_TAG  ? "\\u003C" : "<",
             ">"  => $options & JSON_HEX_TAG  ? "\\u003E" : ">",
             "'"  => $options & JSON_HEX_APOS ? "\\u0027" : "'",
             "\"" => $options & JSON_HEX_QUOT ? "\\u0022" : "\"",
             "&"  => $options & JSON_HEX_AMP  ? "\\u0026" : "&",
         );
         $var = strtr($var, $rewrite);
         //@COMPAT control chars should probably be stripped beforehand, not escaped as here
         if (function_exists("iconv") && ($options & JSON_UNESCAPED_UNICODE) == 0) {
            $var = preg_replace("/[^\\x{0020}-\\x{007F}]/ue", "'\\u'.current(unpack('H*', iconv('UTF-8', 'UCS-2BE', '$0')))", $var);



         }
         $json = '"' . $var . '"';
      }

      #-- basic types
      elseif (is_bool($var)) {
         $json = $var ? "true" : "false";

if (!defined("JSON_ERROR_NONE")) {
   define("JSON_ERROR_NONE", 0);
   define("JSON_ERROR_DEPTH", 1);
   define("JSON_ERROR_STATE_MISMATCH", 2);
   define("JSON_ERROR_CTRL_CHAR", 3);
   define("JSON_ERROR_SYNTAX", 4);
   define("JSON_ERROR_UTF8", 5);
 }
if (!function_exists("json_last_error")) {
   function json_last_error() {
       global ${'.json_last_error'}; 
       return ${'.json_last_error'}; // gives a notice if json_decode was never invoked before (no status constant for that)
   }
}