title: Is it allowed to call non-static methods with call_user_func?
body: <p>When I use <code>call_user_func</code> on a non-static method in PHP 5.2 I get a Strict Warning: </p>
  
  <pre><code>Strict Standards: Non-static method User::register() cannot be called statically
  </code></pre>
  
  <p>But on PHP 5.3.1 I don't get this warning. Is this a bug in PHP 5.3.1 or is the warning removed?</p>