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

## Check-in [a33d1695b1]

     > > > > > > > > > > > > > > > > > > > > > > >  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23   $value) {$r[] = "$indent " . ($indexed ? "" : var_export54($key) . " => ") . var_export54($value, "$indent "); } return "[\n" . implode(",\n",$r) . "\n" . $indent . "]"; case "boolean": return$var ? "TRUE" : "FALSE"; default: return var_export($var, TRUE); } } print var_export54(["B"=>1.2,"C"=>TRUE,"D"=>3,"E"=>[4,"\\text \"\$here\r\n\t",6,[7,8]]]);