Post GCM using PHP

<?php
// Replace with real BROWSER API key from Google APIs
$apiKey = "your-api-key";

// Replace with real client registration IDs. Put the correct registration id you are getting from app. If you are using eclipse check your logcat you will get it there.
$registrationIDs = array( "regid" );

// Message to be sent
$message = "Your Message Here";

// Set POST variables.
$url = 'https://android.googleapis.com/gcm/send';

$fields = array(
                'registration_ids'  => $registrationIDs,
                'data'              => array( "message" => $message ) /*Make sure that message is the key you are using in GCMIntentService.java onMessage() ->  extras.getString("message");*/
                );

$headers = array(
                    'Authorization: key=' . $apiKey,
                    'Content-Type: application/json'
                );

// Open connection
$ch = curl_init();

// Set the url, number of POST vars, POST data
curl_setopt( $ch, CURLOPT_URL, $url );

curl_setopt( $ch, CURLOPT_POST, true );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );

// Execute post
$result = curl_exec($ch);

// Close connection
curl_close($ch);

// Echo success or failure
echo $result;