note 57257 added to function.shell-exec

I am trying to add a user using pw command with the help of shell_exec in php. A error log is created the you need to be a root user. I am in root mode but the apache server is in www user mode. So any one can find a solution for this?? :-) ---- Manual Page -- http://www.php.net/manual/en/function.shell-exec.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+57257 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+57257&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+57257&report=yes Search -- http://master.php.net/manage/user-notes.php