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run code in 150+ php & hhvm versions
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<?php $str = "oAA34Ao#\\\\ooo/"; echo preg_replace_callback( '/([\x00-\x1F\*\(\)\\\\])/', function ($matches) { return "\\".join("", unpack("H2", $matches[1])); }, $str ); $str = "oAA34Ao#\\\\ooo/"; function matches($matches) { return "\\".join("", unpack("H2", $matches[1])); } echo ' ' . mb_ereg_replace_callback( '([\x00-\x1F\*\(\)\\\\])', "matches", $str ); ?>
Output for 5.4.1 - 5.6.21, 7.0.0 - 7.1.0
oAA34Ao#\5c\5cooo/ oAA34Ao#\5c\5cooo/
Output for hhvm-3.10.0 - 3.12.0
oAA34Ao#\5c\5cooo/ Fatal error: Call to undefined function mb_ereg_replace_callback() in /in/FjY4I on line 22
Process exited with code 255.
Output for 5.3.0 - 5.4.0
oAA34Ao#\5c\5cooo/ Fatal error: Call to undefined function mb_ereg_replace_callback() in /in/FjY4I 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/FjY4I 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/FjY4I on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/FjY4I on line 7
Process exited with code 255.