note 81625 added to function.preg-match

Can I user this to match a partial username ? for example I user if (!preg_match("/^[a-zA-Z\d\-_]+$/i", $username)) { blah blah if I want to check if a username has special characters or spaces. what is wanted to do something like: user enters username test username test is a banned username so how would I block anything that has test in the username ? ---- Server IP: 208.69.120.35 Probable Submitter: 68.76.44.142 ---- Manual Page -- http://www.php.net/manual/en/function.preg-match.php Edit -- https://master.php.net/note/edit/81625 Del: integrated -- https://master.php.net/note/delete/81625/integrated Del: useless -- https://master.php.net/note/delete/81625/useless Del: bad code -- https://master.php.net/note/delete/81625/bad+code Del: spam -- https://master.php.net/note/delete/81625/spam Del: non-english -- https://master.php.net/note/delete/81625/non-english Del: in docs -- https://master.php.net/note/delete/81625/in+docs Del: other reasons-- https://master.php.net/note/delete/81625 Reject -- https://master.php.net/note/reject/81625 Search -- https://master.php.net/manage/user-notes.php