note 49328 added to function.imagejpeg

how could I check if my php on server already include imagejpeg library that I could call imagejpeg function directly from my php code? Thanks. ---- Manual Page -- http://www.php.net/manual/en/function.imagejpeg.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+49328 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+49328&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+49328&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+49328&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+49328&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+49328&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+49328&report=yes Search -- http://master.php.net/manage/user-notes.php