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run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_mathc('[^a-z\\d_]', strtolower('bug-fix'), $m); var_dump($m);
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined function preg_mathc() in /in/67iek:2 Stack trace: #0 {main} thrown in /in/67iek on line 2
Process exited with code 255.
Output for 5.0.0 - 5.6.28, hhvm-3.12.0
Fatal error: Call to undefined function preg_mathc() in /in/67iek on line 2
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: preg_mathc() in /in/67iek on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: preg_mathc() in /in/67iek on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: preg_mathc() in /in/67iek on line 2