Android通知推送php错误

我正在尝试向用户发送通知推送，但无法完成

这是我在php中使用的代码

    $message = new gcm(); 
    $message->sendMessageToPhone(2, $message,$valor);

    class gcm 
    { 
    function sendMessageToPhone($collapseKey, $messageText, $gcmcode)  
{           
         $apiKey = 'there is my apikey';  
         $headers = array('Authorization:key=' . $apiKey); 
         $data = array(      'registration_id' => $gcmcode,      'collapse_key' => $collapseKey,      'data.message' => $messageText);
         $ch = curl_init(); 
         curl_setopt($ch, CURLOPT_URL, "https://android.googleapis.com/gcm/send"); 
         if ($headers)     curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);  
         curl_setopt($ch, CURLOPT_POST, true); 
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
         curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
         $response = curl_exec($ch);  
         $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);  
         if (curl_errno($ch)) {     return 'fail';    }    
         if ($httpCode != 200) {     return 'status code 200';    }  
         curl_close($ch);   
         return $response;      
}

当我执行php时，我得到了这个错误

可捕获的致命错误：第25行的/path/gcm.php中的类gcm的对象无法转换为字符串

---

第25行=curl_setopt（$ch，CURLOPT_POSTFIELDS，$data）

嗨，朋友，我不得不为Symfony 2.x上的某个包开发一个推送通知部分 只使用类和更改名称空间，添加密钥，希望对您有所帮助。我很抱歉我的英语不好

记住，设备的Id必须在云中注册

从控制器：

    /*
     * Google API Key
     */
    define("GOOGLE_API_KEY", "xxxxxxxxxxxxxx"); // Place your Google API Key
    $gcm = new \MessageBundle\Classes\GCM();

    $message = "Hello";
$registatoin_ids = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
$gcm->send_notification($registatoin_ids, $message);

班级：

    <?php


/**
 * GCM
 *
 * @author Esteban lopez
 */
class GCM {


    // constructor
    function __construct() {

    }

    /**
     * Sending Push Notification
     */
    public function send_notification($registatoin_ids, $message) {

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

        $fields = array(
            'registration_ids' => $registatoin_ids,
            'data' => $message,
        );

        $headers = array(
            'Authorization: key=' . GOOGLE_API_KEY,
            '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);

        // Disabling SSL Certificate support temporarly
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));

        // Execute post
        $result = curl_exec($ch);
        if ($result === FALSE) {
            die('Curl failed: ' . curl_error($ch));
        }

        // Close connection
        curl_close($ch);
       // echo $result;
    }

}

---

您缺少gcm的构造函数。在类gcm内的php中添加以下行

function __construct() {

}