3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = "oAAAoooo"; echo preg_replace_callback( '/([\x00-\x1F\*\(\)\\\\])/', function ($matches) { return "\\".join("", unpack("H2", $matches[1])); }, $str ); $str = "oAAAoooo"; function matches($matches) { return "\\".join("", unpack("H2", $matches[1])); } echo mb_ereg_replace_callback( '([\x00-\x1F\*\(\)\\\\])', "matches", $str ); ?>
Output for 5.4.1 - 5.6.28, 7.0.0 - 7.1.0
oAAAoooooAAAoooo
Output for hhvm-3.12.0 - 3.13.2
oAAAoooo Fatal error: Uncaught Error: Call to undefined function mb_ereg_replace_callback() in /in/AaN2s:22 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.10.0
oAAAoooo Fatal error: Call to undefined function mb_ereg_replace_callback() in /in/AaN2s on line 22
Process exited with code 255.
Output for 5.3.0 - 5.4.0
oAAAoooo Fatal error: Call to undefined function mb_ereg_replace_callback() in /in/AaN2s on line 18
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/AaN2s on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/AaN2s on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AaN2s on line 7
Process exited with code 255.