3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'a\\\\,b,c\\,d'; var_dump(preg_split('/((?=[^\\]\\)|\G),/', $str));
Output for 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
Warning: preg_split(): Compilation failed: escape sequence is invalid in character class at offset 12 in /in/ud6bW on line 3 bool(false)
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 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 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: preg_split(): Compilation failed: missing terminating ] for character class at offset 15 in /in/ud6bW on line 3 bool(false)
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: missing terminating ] for character class at offset 15 in /in/ud6bW on line 3 bool(false)
preferences:
300.96 ms | 402 KiB | 459 Q