run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = "abcdefffefa"; $b = "afe"; print(str_replace(array_uniq(explode('', $a)), '', $b));
based on tQNQDP

Shows result from various feature-branches currently under review from the php developers. Contact me to have additional branches featured.

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page