title: How to capture POST data with contact form7
body: <p>I have this hook in my functions.php:</p>
  
  <pre><code>add_action( 'wpcf7_mail_sent', 'myfunction' );
  </code></pre>
  
  <p>I want to post the values when the form is sent. </p>
  
  <p>I have a field like this: <code>[textarea your-message]</code>. </p>
  
  <p>How do i capture the POST data from this?</p>
  
  <p>for example when the form is sent i want to echo the post value of  <code>[textarea your-message]</code> in <code>myfunction(){}</code></p>