＆＃34;要求此资源需要访问令牌。＆＃34;使用PHP将消息发布到FB页面

Question

我正在尝试创建一个PHP应用程序，它将消息直接发布到FB页面。但在发布消息时遇到一些问题。我收到了以下错误： -

{
   "error": {
      "message": "An access token is required to request this resource.",
      "type": "OAuthException",
      "code": 104
   }
} 

以下是我的代码： -

<?php 

    class Facebook
    {
        private $page_id = 'Page ID';   
        private $page_access_token = 'access-code';
        private $post_url = '';

        public function Facebook()
        {
            $this->post_url = 'https://graph.facebook.com/'.$this->page_id.'/feed';
        }

        public function message($data)
        {
            $data['access_token'] = $this->page_access_token;
            $ch = curl_init();
            echo "Link:- ".$this->post_url;
            curl_setopt($ch, CURLOPT_URL, $this->post_url);
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            $return = curl_exec($ch);
            curl_close($ch);
            return $return;
        }
    }

    $facebook = new Facebook(); 
    $facebook->message(array( 'message'  => 'Best Service'));
    ?>

我尝试了很多来解决这个错误。我检查了访问令牌n页面ID也都正确但仍然出现此错误。

请指导我解决此错误....

提前致谢......