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Sending Android Push Notifications from PHP to PhoneGap Apps

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Sending Android Push Notifications from PHP to PhoneGap Apps

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For the last few days I’ve been working within a Phonegap project for Android devices using Push Notifications. The idea is simple. We need to use the Push Notification Plugin for Android. First we need to register the Google Cloud Messaging for Android service at Google’s console, and then we can send Push notifications to our Android device.

The Push Notification plugin provides a simple example to send notifications using Ruby. Normally my backend is built with PHP (and sometimes Python) so instead of using the ruby script we are going to build a simple PHP script to send Push Notifications.

The script is very simple:

$apiKey = "myApiKey";
$regId = "device reg ID";

$pusher = new AndroidPusher\Pusher($apiKey);
$pusher->notify($regId, "Hola");


And the whole library you can see here:

namespace AndroidPusher;

class Pusher
    const GOOGLE_GCM_URL = 'https://android.googleapis.com/gcm/send';

    private $apiKey;
    private $proxy;
    private $output;

    public function __construct($apiKey, $proxy = null)
        $this->apiKey = $apiKey;
        $this->proxy  = $proxy;

     * @param string|array $regIds
     * @param string $data
     * @throws \Exception
    public function notify($regIds, $data)
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, self::GOOGLE_GCM_URL);
        if (!is_null($this->proxy)) {
            curl_setopt($ch, CURLOPT_PROXY, $this->proxy);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $this->getHeaders());
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $this->getPostFields($regIds, $data));

        $result = curl_exec($ch);
        if ($result === false) {
            throw new \Exception(curl_error($ch));


        $this->output = $result;

     * @return array
    public function getOutputAsArray()
        return json_decode($this->output, true);

     * @return object
    public function getOutputAsObject()
        return json_decode($this->output);

    private function getHeaders()
        return [
            'Authorization: key=' . $this->apiKey,
            'Content-Type: application/json'

    private function getPostFields($regIds, $data)
        $fields = [
            'registration_ids' => is_string($regIds) ? [$regIds] : $regIds,
            'data'             => is_string($data) ? ['message' => $data] : $data,


Maybe we could improve the library with a parser of google’s ouptuput, basically because we need to handle this output to notice if the user has uninstalled the app (and we need the remove his reg-id from our database), but at least now it cover all my needs. You can see the code at github


Published at DZone with permission of Gonzalo Ayuso, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.


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