ios push notification for multiple devices - php

Question

I have the following php code for ios push notification.Here i code for 2 devices using loop in fwrite() section . the current code is working properly . My doubt is , can i pass the array of device tokens directly without using the for loop?.
<?php
// Put your device token here (without spaces):
$deviceToken[0] = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
$deviceToken[1] = 'yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy';
// Put your private key's passphrase here:
$passphrase = '123456';
// Put your alert message here:
$message = 'multiple device push notification...!';
////////////////////////////////////////////////////////////////////////////////
$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'local_cert', 'abc.pem');
stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase);
// Open a connection to the APNS server
$fp = stream_socket_client(
'ssl://gateway.sandbox.push.apple.com:2195', $err,
$errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);
if (!$fp)
exit("Failed to connect: $err $errstr" . PHP_EOL);
echo 'Connected to APNS' . PHP_EOL;
// Create the payload body
$body['aps'] = array(
'alert' => $message,
'sound' => 'default',
'badge' => '+1'
);
// Encode the payload as JSON
$payload = json_encode($body);
for($i=0;$i<2;$i++)
{
// Build the binary notification
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken[$i]) . pack('n', strlen($payload)) . $payload;
// Send it to the server
$result = fwrite($fp, $msg, strlen($msg));
echo "msg may be delivered";
}
if (!$result)
echo 'Message not delivered' . PHP_EOL;
else
echo 'Message successfully delivered' . PHP_EOL;
// Close the connection to the server
fclose($fp);

Answer 1

Its design by default, yet there is no option for passing array of device tokens. You have to iterate through the loop.

Answer 2

Alternate to this approach will be using third party like amazon SNS service. Here you can publish to topic(one request) and all devices that are subscribed to this topic will receive the notification.