note 59074 added to function.shell-exec

Hi! I want to execute some external commands and if it is not able to finish the process within 30 sec then it should automatically stop/cancel the process and return kina time out message. Can anybody say how to do that ? ---- Manual Page -- http://www.php.net/manual/en/function.shell-exec.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59074 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59074&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59074&report=yes Search -- http://master.php.net/manage/user-notes.php