3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php error_reporting(0); $a = "abcdefffefa"; $b = "afe"; print_r(explode('', $b)); print(str_replace(array_unique(explode('', $b)), "", $a));
based on jM8tI
Output for 4.3.0 - 7.2.0
abcdefffefa