3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_replace("/^[^a-zA-Z]+|[\!\#$\%\&\'\* \+\/\=\?\^\`{\|\}\~]+/", "", '_(32jkashdfkj$#')); var_dump( preg_replace( '|[^a-z0-9 _.\-@]|i', '', '_(32jkashdfkj$#' ));

preferences:
35.21 ms | 402 KiB | 5 Q