title: Change GET's values
body: <p>I want to change my GET's values in PHP.</p>
  
  <p><strong>For example, I want to change this:</strong></p>
  
  <pre><code>mypage.com/?lang=fr&amp;page=home&amp;...
  </code></pre>
  
  <p><strong>To this:</strong></p>
  
  <pre><code>mypage.com/?lang=en&amp;page=home&amp;...
  </code></pre>
  
  <p>I could make it with an <code>str_replace</code> and <code>substr</code> but I'm looking a less stupid way.</p>
  
  <p>I would like to use <code>$_SERVER['QUERY_STRING']</code>.</p>
  
  <p>Thanks.</p>