title: How to Capture Wordpress $_POST
body: <p>I'm working on a website that has a shortcode subscription form on a page and I'd like access to the $_POST data. Is it possible for me to add my own shortcode to that page to access the $_POST data?</p>
  
  <p>Thanks
  Mike</p>
  
  <pre><code>function mgc_init(){
          var_dump($_POST);
  }
  
  add_shortcode('mgc','mgc_init');
  </code></pre>
  
  <p><strong>UPDATE</strong>: I'm not sure if I'm placing this shortcode in the right place in order to get access to the $_POST data. The form that gets submitted is inside a different shortcode (on the same Wordpress page). Do I need a hook get the $_POST data?   </p>