3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php error_reporting(0); $a = "abcdefffefa"; $b = "afe"; print(str_replace(array_unique(str_split($b)), "", $a));
based on G74Dd
Output for 5.0.0 - 7.2.0
bcd
Output for 4.3.2 - 4.4.9

Process exited with code 255.
Output for 4.3.0 - 4.3.1