gcmsend.php

// generic php function to send GCM push notification
	public function sendPushNotificationToGCM($registatoin_ids, $message) {
		// Google cloud messaging GCM-API url
		$url = 'https://android.googleapis.com/gcm/send';
		$fields = array (
				'registration_ids' => $registatoin_ids,
				'data' => $message 
		);
		// Google Cloud Messaging GCM API Key
		define ( "GOOGLE_API_KEY", " GCM_KEY" );
		$headers = array (
				'Authorization: key=' . GOOGLE_API_KEY,
				'Content-Type: application/json' 
		);
		$ch = curl_init ();
		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_SSL_VERIFYPEER, false );
		curl_setopt ( $ch, CURLOPT_POSTFIELDS, json_encode ( $fields ) );
		$result = curl_exec ( $ch );
		if ($result === FALSE) {
			die ( 'Curl failed: ' . curl_error ( $ch ) );
		}
		curl_close ( $ch );
		return $result;
	}

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