3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(0); $a = "abcdefffefa"; $b = "afe"; print(array_unique(explode('', $b))); print(str_replace(array_unique(explode('', $b)), "", $a));
based on oebuZ
Output for 4.3.0 - 7.1.0
abcdefffefa