title: Parse error: syntax error, unexpected '$author' (T_VARIABLE)
body: <p>my php file:</p>
  
  <pre><code>    if($operation=='upload'){
      if(isset($data -&gt; paper) &amp;&amp; !empty($data -&gt; paper) &amp;&amp; isset($data -&gt; paper -&gt; author) &amp;&amp; isset($data -&gt; paper -&gt; description) &amp;&amp; isset($data -&gt; paper -&gt; title))｛
  
        $author = $data -&gt; paper -&gt; author;
        $description= $data -&gt; paper -&gt; description;
        $title = $data -&gt; paper -&gt; title;
  
        echo $fun -&gt; uploadPaper($author,$description,$title);
      ｝
  </code></pre>
  
  <p>json</p>
  
  <pre><code>  {
     "operation": "upload",
     "paper": {
      "author": "Mark Watson",
      "description": "The book writing about AI by Mark Waton",
      "title": "Practical Artificial Intelligence Programming With Java"
  }
  }
  </code></pre>
  
  <p>when i send json to server by post method,there is a error:</p>
  
  <p>Parse error: syntax error, unexpected '$author' (T_VARIABLE) in D:\xampp\htdocs\server\index.php on line 78</p>
  
  <p>i really don't know what is happening!please  tell me</p>