3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = 'a,b,c,d'; return preg_split('/(?<![^\\\\]\\\\),/', $str);
Output for 4.4.5 - 4.4.9, 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Output for 4.3.11 - 4.4.4, 5.0.0 - 5.1.6
Warning: preg_split(): Compilation failed: lookbehind assertion is not fixed length at offset 11 in /in/ClH4B on line 3
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: lookbehind assertion is not fixed length at offset 11 in /in/ClH4B on line 3