title: PHP Function name must be a string error on new variable
body: <p>I am getting the error:</p>
  
  <p>Function name must be a string on this code:</p>
  
  <pre><code>$profile_data = $user_data('first_name','last_name','email');
  </code></pre>
  
  <p>Any ideas why this could be?</p>