Sometime we do need to send additional data while sending Push-notification on iPhone , this can be easily achieved by adding following line to your code. But one should keep in mind that apple does have a limitation of 144 character while sending a push notification. Thus you notification should not increase the specified limit else the given device wont be receiving the notification :

                   $apnsHost = 'gateway.sandbox.push.apple.com';      
            $apnsPort = 2195;
            $passphrase = 'push'; 
            $streamContext = stream_context_create();
            stream_context_set_option($streamContext, 'ssl', 'local_cert',WWW_ROOT.'ck.pem');        
            stream_context_set_option($streamContext, 'ssl', 'passphrase', $passphrase);
            $apns = stream_socket_client('ssl://gateway.sandbox.push.apple.com:2195' , $error, $errorString, 20, STREAM_CLIENT_CONNECT, $streamContext); 

            if (!$apns) {
                //print "Failed to connect ......... $error $errorString\n"; echo "
";         
            } else {
                        $message ="";
                        $data=array();
                        $message =$senderData['User']['name'].' has shared an event with  you start date :'.$albumData['Album']['start_on'].' end data :    '.$albumData['Album']['end_on'] ;
                        $data['album_id']=$albumData['Album']['id'];
                        $data['start_on']=$albumData['Album']['start_on'];
                        $data['type']=$albumData['Album']['type'];
                        $data['username']=$senderData['User']['name'];
                        $data['end_on']=$albumData['Album']['end_on'];

                $payload['aps'] = array('alert' => $message, 'badge' => $notificationCount, 'sound' => 'default');
                        $payload['server'] = $data;        
            $output = json_encode($payload);
            $token = pack('H*', str_replace(' ', '', $device_token));   
            $apnsMessage = chr(0) . chr(0) . chr(32) . $token . chr(0) . chr(strlen($output)) . $output;            
            $result = fwrite($apns, $apnsMessage);
            }

            try {                   
                socket_close($apns);                   
                fclose($apns);                 
            } catch(Exception $e) {

            }