note 56887 added to function.preg-replace

I recently had to get the level 2 domain name for a login application, so I can set cookies for the domain itself and not just whichever subdomain people use. ie. turning this: www.6dots.net:80 into this: .6dots.net This will do the trick: $pattern="/^(\w+\.)(\w+\.\w+)(:.*$)*/"; $replace=".$2"; $cookiedomain = preg_replace($pattern,$replace,$_SERVER["HTTP_HOST"]); print("COOKIE DOMAIN: ".$_SERVER["HTTP_HOST"]." --> ".$cookiedomain); ---- Manual Page -- http://www.php.net/manual/en/function.preg-replace.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+56887 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+56887&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+56887&report=yes Search -- http://master.php.net/manage/user-notes.php