note 106659 added to function.connection-aborted

I have a chat program. I currently want that when user close browser (such as firefox or chrome) how know this action at server because i want to execute some scripts at here. i need some help. Thank ---- Server IP: 64.71.164.2 Probable Submitter: 116.193.75.10 ---- Manual Page -- http://www.php.net/manual/en/function.connection-aborted.php Edit -- https://master.php.net/note/edit/106659 Del: integrated -- https://master.php.net/note/delete/106659/integrated Del: useless -- https://master.php.net/note/delete/106659/useless Del: bad code -- https://master.php.net/note/delete/106659/bad+code Del: spam -- https://master.php.net/note/delete/106659/spam Del: non-english -- https://master.php.net/note/delete/106659/non-english Del: in docs -- https://master.php.net/note/delete/106659/in+docs Del: other reasons-- https://master.php.net/note/delete/106659 Reject -- https://master.php.net/note/reject/106659 Search -- https://master.php.net/manage/user-notes.php