title: php - check if $_POST is array?
body: <p>I know this may be a silly question, but I come across a snippet of php code that check if the <code>$_POST</code> <code>is_array()</code> before execute other functions.</p>
  
  <p>Now I guess that $_POST should be always an associative array or not? is this check really needed? and why?</p>