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run code in 150+ php & hhvm versions
Bugs & Features
<?php function func($input) { return preg_replace_callback('/YO\_\{(.*?)\}/s', 'func', $input); } $input = <<<'EOD' YO_{ YO_{ YO_{ McDonalds. } } } EOD; echo func($input);
Output for 5.3.0 - 5.4.35, 5.4.38 - 5.6.28, 7.0.0 - 7.1.0

Process exited with code 139.
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Stack overflow in /in/d00rD on line 3
Process exited with code 255.
Output for 5.4.36 - 5.4.37

Process exited with code 135.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_SL in /in/d00rD on line 6
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_SL in /in/d00rD on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/d00rD on line 6
Process exited with code 255.