“警告：curl_setopt（）：和致命错误：”在推送通知中

Question

我正在尝试使用php实现推送通知。我的代码如下，

文件1： push.php

<?php 
// Server file
class PushNotifications {
    // (Android)API access key from Google API's Console.
    private static $API_ACCESS_KEY = 'AIzaSyDG3fYAj1uW7VB-wejaMJyJXiO5JagAsYI';
    // (iOS) Private key's passphrase.
    private static $passphrase = 'joashp';
    // (Windows Phone 8) The name of our push channel.
        private static $channelName = "joashp";

    // Change the above three vriables as per your app.
    public function __construct() {
        exit('Init function is not allowed');
    }

        // Sends Push notification for Android users
    public function android($data, $reg_id) {
            $url = 'https://android.googleapis.com/gcm/send';
            $message = array(
                'title' => $data['mtitle'],
                'message' => $data['mdesc'],
                'subtitle' => '',
                'tickerText' => '',
                'msgcnt' => 1,
                'vibrate' => 1
            );

            $headers = array(
                'Authorization: key=' .self::$API_ACCESS_KEY,
                'Content-Type: application/json'
            );

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

            return self::useCurl($url, json_encode($headers), json_encode($fields)); 
        }

    // Sends Push's toast notification for Windows Phone 8 users
    public function WP($data, $uri) {
        $delay = 2;
        $msg =  "<?xml version=\"1.0\" encoding=\"utf-8\"?>" .
                "<wp:Notification xmlns:wp=\"WPNotification\">" .
                    "<wp:Toast>" .
                        "<wp:Text1>".htmlspecialchars($data['mtitle'])."</wp:Text1>" .
                        "<wp:Text2>".htmlspecialchars($data['mdesc'])."</wp:Text2>" .
                    "</wp:Toast>" .
                "</wp:Notification>";

        $sendedheaders =  array(
            'Content-Type: text/xml',
            'Accept: application/*',
            'X-WindowsPhone-Target: toast',
            "X-NotificationClass: $delay"
        );

        $response = $this->useCurl($uri, $sendedheaders, $msg);

        $result = array();
        foreach(explode("\n", $response) as $line) {
            $tab = explode(":", $line, 2);
            if (count($tab) == 2)
                $result[$tab[0]] = trim($tab[1]);
        }

        return $result;
    }

        // Sends Push notification for iOS users
    public function iOS($data, $devicetoken) {
        $deviceToken = $devicetoken;
        $ctx = stream_context_create();
        // ck.pem is your certificate file
        stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem');
        stream_context_set_option($ctx, 'ssl', 'passphrase', self::$passphrase);
        // Open a connection to the APNS server
        $fp = stream_socket_client(
            'ssl://gateway.sandbox.push.apple.com:2195', $err,
            $errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);
        if (!$fp)
            exit("Failed to connect: $err $errstr" . PHP_EOL);
        // Create the payload body
        $body['aps'] = array(
            'alert' => array(
                'title' => $data['mtitle'],
                'body' => $data['mdesc'],
             ),
            'sound' => 'default'
        );
        // Encode the payload as JSON
        $payload = json_encode($body);
        // Build the binary notification
        $msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload;
        // Send it to the server
        $result = fwrite($fp, $msg, strlen($msg));

        // Close the connection to the server
        fclose($fp);
        if (!$result)
            return 'Message not delivered' . PHP_EOL;
        else
            return 'Message successfully delivered' . PHP_EOL;
    }

    // Curl 
    private function useCurl($url, $headers, $fields) {
            // Open connection
            $ch = curl_init();
            if ($url) {
                // 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($ch, CURLOPT_SSL_VERIFYPEER, false);
                if ($fields) {
                    curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
                }

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

                // Close connection
                curl_close($ch);

                return $result;
        }
    }

}
?>

文件2： test.php

<?php
        require_once('push.php');
    // Message payload
    $msg_payload = array (
        'mtitle' => 'Test push notification title',
        'mdesc' => 'Test push notification body',
    );

    // For Android
    $regId = 'APA91bHdOmMHiRo5jJRM1jvxmGqhComcpVFDqBcPfLVvaieHeFI9WVrwoDeVVD1nPZ82rV2DxcyVv-oMMl5CJPhVXnLrzKiacR99eQ_irrYogy7typHQDb5sg4NB8zn6rFpiBuikNuwDQzr-2abV6Gl_VWDZlJOf4w';
    // For iOS
    $deviceToken = 'FE66489F304DC75B8D6E8200DFF8A456E8DAEACEC428B427E9518741C92C6660';
    // For WP8
    $url = 'http://s.notify.live.net/u/1/sin/HmQAAAD1XJMXfQ8SR0b580NcxIoD6G7hIYP9oHvjjpMC2etA7U_xy_xtSAh8tWx7Dul2AZlHqoYzsSQ8jQRQ-pQLAtKW/d2luZG93c3Bob25lZGVmYXVsdA/EKTs2gmt5BG_GB8lKdN_Rg/WuhpYBv02fAmB7tjUfF7DG9aUL4';

    // Replace the above variable values


        PushNotifications::android($msg_payload, $regId);

        PushNotifications::WP8($msg_payload, $url);

        PushNotifications::iOS($msg_payload, $deviceToken);
?>

但是我得到了错误，

Warning: curl_setopt(): You must pass either an object or an array with the CURLOPT_HTTPHEADER argument in G:\xampp\htdocs\push_notification\PushNotifications.php on line 115

Fatal error: Call to undefined method PushNotifications::WP8() in G:\xampp\htdocs\push_notification\TestNotifications.php on line 21

应采取哪些措施来纠正此错误并获取推送通知？请帮忙。谢谢。