title: CodeIgniter: post variable not being read
body: <p>I have a controller <code>user</code> with a method <code>login</code></p>
  
  <p>For some reason, when I call:</p>
  
  <pre><code>$this-&gt;post
  </code></pre>
  
  <p>I get an error <code>Undefined property: User::$post</code></p>
  
  <p>While, this works fine:</p>
  
  <pre><code>print_r($_POST);
  </code></pre>