title: showing contents of another page without changing url
body: <p>I already have pages like</p>
  
  <pre><code>http://example.com/page1
  http://example.com/page2
  http://example.com/page3
  </code></pre>
  
  <p>I need to load those pages on following subdomain</p>
  
  <pre><code>http://page1.example.com/
  http://page2.example.com/
  http://page3.example.com/
  </code></pre>
  
  <p>It should work as <a href="http://page1.example.com/" rel="nofollow">http://page1.example.com/</a> should load contents of <a href="http://example.com/page1" rel="nofollow">http://example.com/page1</a>, <strong>without changing URL in browser address bar</strong></p>
  
  <p>I have used following code, but it changes URL in browser address bar</p>
  
  <pre><code>header('Location: http://example.com/page1'); 
  </code></pre>
  
  <p>Help please.</p>