joomla3.0 - Auto redirect to another page In Joomla -

joomla3.0 - Auto redirect to another page In Joomla -

i making payment through paypal. after payment completion redirect website(complete.php) page. have code in complete.php update credit in database. when refresh same page automatically update credits in database. want update credit when payment done. code using in complete.php is:

$db = jfactory::getdbo(); $result = null; $user = jfactory::getuser(); if ($user->guest) { homecoming false; } $query = 'select credit' . ' #__vodes_credits' . ' userid = ' . (int) $user->id ; $db->setquery($query); $result = $db->loadresult(); $result_final=$result+20; $query = 'update #__vodes_credits set credit='.$result_final. ' userid = ' . (int) $user->id ; //echo $query; //echo $query; $db->setquery($query); $result = $db->loadresult(); if ($db->geterrornum()) { jerror::raisewarning( 500, $db->stderr()); } homecoming $result; ?> please help me sought out.

i recommend create cookie before payment , destroy cookie after first time user has visited complete.php, work.

regards.

joomla joomla3.0