3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = 'a\\\\,b,c\\,d'; var_dump(preg_split('/(?<!(?<=\\\\)\\\\),/', $str));
based on vdB5N
Output for 4.3.0 - 7.2.0
array(3) { [0]=> string(5) "a\\,b" [1]=> string(2) "c\" [2]=> string(1) "d" }