3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜaaaaaÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûýýþÿ'; $b = 'aaaaaaaceeeeiiiidnoooooouuuuybsaaaaaaaceeeeiiiidnoooooouuuyyby'; preg_replace('/[^a-zA-Z0-9_ %\[\]\.\(\)%&-]/s', '', $a); echo $a;

preferences:
42.18 ms | 402 KiB | 5 Q