note 101575 added to function.preg-match

When trying to check a file path that could be windows or unix it took me quite a few tries to get the escape characters right. The Unix directory separator must be escaped once and the windows directory separator must be escaped twice. This will match path/to/file and path\to\file.exe preg_match('/^[a-z0-9_.\/\\\]*$/i', $file_string); ---- Server IP: 217.71.118.186 Probable Submitter: 80.200.227.91 ---- Manual Page -- http://www.php.net/manual/en/function.preg-match.php Edit -- https://master.php.net/note/edit/101575 Del: integrated -- https://master.php.net/note/delete/101575/integrated Del: useless -- https://master.php.net/note/delete/101575/useless Del: bad code -- https://master.php.net/note/delete/101575/bad+code Del: spam -- https://master.php.net/note/delete/101575/spam Del: non-english -- https://master.php.net/note/delete/101575/non-english Del: in docs -- https://master.php.net/note/delete/101575/in+docs Del: other reasons-- https://master.php.net/note/delete/101575 Reject -- https://master.php.net/note/reject/101575 Search -- https://master.php.net/manage/user-notes.php