note 115640 added to function.session-is-registered

If your session variables may have NULL value, use array_key_exists() instead of isset(). If not, use isset() because it performs better than array_key_exists(). ---- Server IP: 72.52.91.14 Probable Submitter: 219.209.194.119 ---- Manual Page -- http://php.net/manual/en/function.session-is-registered.php Edit -- https://master.php.net/note/edit/115640 Del: integrated -- https://master.php.net/note/delete/115640/integrated Del: useless -- https://master.php.net/note/delete/115640/useless Del: bad code -- https://master.php.net/note/delete/115640/bad+code Del: spam -- https://master.php.net/note/delete/115640/spam Del: non-english -- https://master.php.net/note/delete/115640/non-english Del: in docs -- https://master.php.net/note/delete/115640/in+docs Del: other reasons-- https://master.php.net/note/delete/115640 Reject -- https://master.php.net/note/reject/115640 Search -- https://master.php.net/manage/user-notes.php