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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_replace("/^[^a-zA-Z]+|[\!\#$\%\&\'\* \+\/\=\?\^\`{\|\}\~]+/", "", '_(32jkashdfkj$#!!&&')); var_dump( preg_replace( '|[^a-z0-9_.\-@]|i', '', '_(32jkashdfkj$#' ));
Output for 4.3.0 - 7.1.0
string(9) "jkashdfkj" string(12) "_32jkashdfkj"