title: How to detect if $_POST is set?
body: <p>I want to know how to detect if $_POST is set or not.</p>
  
  <p>Right now I detect it like this:</p>
  
  <pre><code>if(isset($_POST['value']))
  </code></pre>
  
  <p>But I'm not looking if value is set anymore. Basically, any POST will work.</p>
  
  <pre><code>if(isset($_POST))
  </code></pre>
  
  <p>I'm not sure how PHP handle this. Perhabs isset($_POST) is always returns true since it's a PHP global?</p>
  
  <p>Basically, how can I do this?</p>