3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $b = "123za\n\r'f"; $a = preg_replace('/[^0-9a-z]/i', '', $b); var_dump($a);
based on qkSc5
Output for 4.3.0 - 7.2.0
string(6) "123zaf"