title: PHP $_GET problems with www.example.com/folder/file?id=2 type URLs
body: <p>I'm changing my site to show friendly URLs like this:</p>
  
  <pre><code>www.example.com/folder/topic
  </code></pre>
  
  <p>Works fine!</p>
  
  <p>But when I add a parameter to the URL:</p>
  
  <pre><code>www.example.com/folder/topic?page=2
  </code></pre>
  
  <p><code>$_GET</code> stops working. It doesn't recognise the parameter at all. Am I missing something? The parameter worked fine before using full URLs.</p>