title: Codeigniter assign another value instead of Null when reading GET/POST
body: <p>In Codeigniter,</p>
  
  <pre><code>$something = isset($_POST['something']) ? $_POST['something'] : NULL;
  </code></pre>
  
  <p>is equal to</p>
  
  <pre><code>$something = $this-&gt;input-&gt;post('something');
  </code></pre>
  
  <p>Is there something like  <code>$something = $this-&gt;input-&gt;post('something','do');</code> in Codeigniter?</p>
  
  <p>What I need is if there is not set post value I need assign another value instead of Null?</p>