title: fatal error Function name must be a string
body: <p>I am trying to get comments from users but the browser says Fatal error: Function name must be a string. My code;</p>
  
  <pre><code>// &lt;form name="form1" method="post" action="posting.php"&gt;
  // &lt;input name="comment" type="text" id="comment" style="width:254px; height:44px;"&gt;
  // &lt;/form&gt;
  
  &lt;?php
  
    $comment = $_POST('comment');//this was the line where problem occured
  
    if(!empty($comment))
    {
      mysql_query("INSERT INTO comment (comment) VALUES('".$comment."')");
    }
  
    echo "$comment";
  
  ?&gt;
  </code></pre>