title: facebook v4 sdk class thrwoing error T_OBJECT_OPERATOR in file FacebookSession.php
body: <p>I am trying to use facebook v4 sdk for login. When I call the  function it generates following error </p>
  
  <pre><code>Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /Facebook/FacebookSession.php on line 93
  </code></pre>
  
  <p>I checked the file and found this is the function that throws error </p>
  
  <pre><code>public function getSessionInfo($appId = null, $appSecret = null)
    {
      $targetAppId = static::_getTargetAppId($appId);
      $targetAppSecret = static::_getTargetAppSecret($appSecret);
      return (new FacebookRequest(
        static::newAppSession($targetAppId, $targetAppSecret),
        'GET',
        '/debug_token',
        array(
          'input_token' =&gt; $this-&gt;getToken(),
        )
      ))-&gt;execute()-&gt;getGraphObject(GraphSessionInfo::className());
    }
  </code></pre>
  
  <p>But I am not able to understand what is wrong in this .</p>
  
  <p>Can any one help me out please 
  Thanks in advance</p>