note 106428 added to function.exec

If you use exec to run a process in the background don't use $! to get the PID; it will not necessarily get the PID of what you've just executed, especially if there happens to be other background processes starting around the same time. MODERATORS: this is in response to dell_petter's post giving an example of a process management class on the exec() discussion page. ---- Server IP: 69.147.83.197 Probable Submitter: 194.80.32.11 (proxied: 148.88.227.99) ---- Manual Page -- http://www.php.net/manual/en/function.exec.php Edit -- https://master.php.net/note/edit/106428 Del: integrated -- https://master.php.net/note/delete/106428/integrated Del: useless -- https://master.php.net/note/delete/106428/useless Del: bad code -- https://master.php.net/note/delete/106428/bad+code Del: spam -- https://master.php.net/note/delete/106428/spam Del: non-english -- https://master.php.net/note/delete/106428/non-english Del: in docs -- https://master.php.net/note/delete/106428/in+docs Del: other reasons-- https://master.php.net/note/delete/106428 Reject -- https://master.php.net/note/reject/106428 Search -- https://master.php.net/manage/user-notes.php