Fcm.php

Fcm.php

<?php
/*
 * Add FCM Class
 */
class Google_Service_Fcm extends Google_Service
{
  /** Set URL for Google Cloud Platform services. */
  const CLOUD_PLATFORM = "https://www.googleapis.com/auth/cloud-platform";
  const FCM = "https://www.googleapis.com/auth/firebase.messaging";

  public $operations;
  
  /**
   * Firebase Messaging Service.
   *
   * @param Google_Client $client
   */
  public function __construct(Google_Client $client)
  {
    parent::__construct($client);
    $this->rootUrl = 'https://fcm.googleapis.com/';
    $this->servicePath = '';
    $this->version = 'v1';
    $this->serviceName = 'fcm';

    $this->operations = new Google_Service_Fcm_Resource_Operations(
        $this,
        $this->serviceName,
        'operations',
        array(
          'methods' => array(
            'send' => array(
              'path' => 'v1/projects/{project}/messages:send',
              'httpMethod' => 'POST',
              'parameters' => array(
                'project' => array(
                  'location' => 'path',
                  'type' => 'string',
                  'required' => true,
                ),
                  'message' => array(
                  'location' => 'query',
                  'type' => 'array',
                  'required' => false,
                ),
              ),
            )
          )
        )
    );
  }
}

Fcm\Empty.php

<?php
/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

class Google_Service_Fcm_Empty extends Google_Model
{
}

Fcm\Resource\Operations.php

<?php
/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

class Google_Service_Fcm_Resource_Operations extends Google_Service_Resource
{
  /**
   *
   * @param string  $project The name of the project to be used.
   * @param array   $message Object that contains message details.
   * @param array   $optParams Optional parameters.
   * @return Google_Service_Fcm_Empty
   */
  public function send($project, $message, $optParams = array())
  {
    $params = array('project' => $project, 'postBody' => $message);
    $params = array_merge($params, $optParams);
    return $this->call('send', array($params), "Google_Service_Fcm_Empty");
  }
}

Usage.php

<?php 

require_once 'vendor/autoload.php';

// json
$returnValue = json_decode('{
	"message": {
		"android": {
			"priority": "high",
			"data": {
				"title": "Hello",
				"body": "Please confirm your availability android"
			}
		},
		"name": "Planning validation",
		"apns": {
			"payload": {
				"aps": {
					"alert": {
						"title": "Hello",
						"body": "Please confirm your availability ios"
					},
					"sound": "default"
				}
			}
		},
		"topic": "your-topic-name"
	}
}', true);


putenv('GOOGLE_APPLICATION_CREDENTIALS=client_cred.json');

$client = new Google_Client();
$client->useApplicationDefaultCredentials();
$client->addScope("https://www.googleapis.com/auth/firebase.messaging");
$service = new Google_Service_Fcm($client);
$data = $service->operations->send("your-project-name", $returnValue);