title: receiving radio box value in php
body: <p>I have 2 following radio boxes in a form,</p>
  
  <pre><code>&lt;input type="radio" name="radio" value="yes" class="radio" /&gt; Yes
  &lt;input type="radio" name="radio" value="no" class="radio" /&gt; No
  </code></pre>
  
  <ol>
  <li>How can i recieve the value of the radio button once the form is posted (in PHP)</li>
  <li>Once it is posted on the same page, how can I <em>remember</em> the selected radio button and keep that checked?
  Thanks.</li>
  </ol>