- preg_replace: documentation ( source)
<?php
$replace = array(
'/</',
'/>/',
'/*/',
'/!/',
'/;/',
'/#/',
'/(/',
'/)/',
'/@/',
'/|/',
'/[/',
'/]/',
'/}/',
'/{/',
'/$/'
);
print preg_replace( $replace, '', 'ls; ${}[]@()#!*<asdlad>' );