3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'a,b,c,d'; return preg_split('/(?<![^\\\\][\\\\]),/', $str);
Output for 4.4.5 - 4.4.9, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.3.11, 4.4.0 - 4.4.4, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: preg_split(): Compilation failed: lookbehind assertion is not fixed length at offset 13 in /in/Mo7cb on line 3
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: lookbehind assertion is not fixed length at offset 13 in /in/Mo7cb on line 3
preferences:
258.25 ms | 401 KiB | 423 Q