note 71536 added to function.preg-quote

If you are placing your quoted string within []'s, make sure you also escape the dash (-) character manually. preg_match("/^[A-Za-z\d" . preg_quote('!@#$%^&*()-_=+\|[]{};:/?.><', '/') . "]{8,32}$/", $password) The above will try to match the characters ')' through '_' whatever those are. So use the below expression: preg_match("/^[A-Za-z\d" . preg_quote('!@#$%^&*()_=+\|[]{};:/?.><', '/') . "\-]{8,32}$/", $password) Yes, I know I can use \w in place of A-Za-z, but I wanted to illustrate my point better :) ---- Server IP: 216.194.113.175 Probable Submitter: 216.130.23.249 ---- Manual Page -- http://www.php.net/manual/en/function.preg-quote.php Edit -- https://master.php.net/note/edit/71536 Del: integrated -- https://master.php.net/note/delete/71536/integrated Del: useless -- https://master.php.net/note/delete/71536/useless Del: bad code -- https://master.php.net/note/delete/71536/bad+code Del: spam -- https://master.php.net/note/delete/71536/spam Del: non-english -- https://master.php.net/note/delete/71536/non-english Del: in docs -- https://master.php.net/note/delete/71536/in+docs Del: other reasons-- https://master.php.net/note/delete/71536 Reject -- https://master.php.net/note/reject/71536 Search -- https://master.php.net/manage/user-notes.php