Google Cloud Messaging(GCM) Serverside example

GoogleCloudMessagingHandler.php

<?php
class GoogleCloudMessagingHandler{
	protected $apiKey;
	protected $ids=array();

	protected $url=   'https://android.googleapis.com/gcm/send';

	public function __construct($apiKey){
		$this->apiKey = $apiKey;
		$this->fetchIds();
	}

	protected function fetchIds(){
		$sql ='SELECT registrationID FROM android_registered_ids';
		$result =DB::getInstance()->getAll($sql, null);
		
		foreach($result as $v){
		$this->ids[] = $v['registrationID'];
		}
	}

	public function sendMessage($message){
		##echo $message;
		#print_r($this->ids);
		//setup fields + headers
		$fields = array(
                'registration_ids'  => $this->ids,
                'data'              => array( "message" => $message ),
                );

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

		//lets curl
		// Open connection
		$ch = curl_init();

		// Set the url, number of POST vars, POST data
		curl_setopt( $ch, CURLOPT_URL, $this->url );
		curl_setopt( $ch, CURLOPT_POST, true );
		curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
		curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
		curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );

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

		// Close connection
		curl_close($ch);

		echo $result ."\n";

	}

	public function registerForMulticast($id){
		if(empty($id))
			return false;
		$sql ='SELECT registrationID 
			FROM android_registered_ids 
			WHERE registrationID = :ID ';
		$data = array(':ID' =>$id);
		$result =DB::getInstance()->getAll($sql,$data);


		if(empty($result) ){
			$sql ='INSERT INTO   
				android_registered_ids 
					(registrationID) 
				VALUES ( :ID )';
			$result =DB::getInstance()->insert($sql, $data );

			return true;
		} else {
			return false;

		}

		return false;



	}

}
define('GCM_API_KEY', 'DEIN API KEY');
$message = "Guten Morgen aus M&uuml;nchen";

$gcmHandler = new GoogleCloudMessagingHandler(GCM_API_KEY);
$gcmHandler->sendMessage($message);