note 25364 added to function.preg-match

How does this handle an expression which can validly match zero characters because every term in the pattern is optional? My guess is that such a pattern is certain to match even if no characters from the target string are subsumed. I'd be concerned about handling successful matches against zero characters if I was relying on advancing match positions to terminate a loop. -- http://www.php.net/manual/en/function.preg-match.php http://master.php.net/manage/user-notes.php?action=edit+25364 http://master.php.net/manage/user-notes.php?action=delete+25364 http://master.php.net/manage/user-notes.php?action=reject+25364