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run code in 150+ php & hhvm versions
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<?php $usernames = array('asdasd123', 'asdas_asdasd123', 'asdsad--asdsa123123', 'asdasd<><><>'); foreach($usernames as $u) { if(preg_match('([A-Za-z0-9\-\_]+)', $u) { echo $u.' is totally valid'; } else { echo $u. 'is not valid'; } }
Output for 5.3.0 - 5.4.30
Parse error: syntax error, unexpected '{' in /in/HSqCs on line 7
Process exited with code 255.