title: Why is ob_gzhandler not working?
body: <p>I use "<strong>ob_gzhandler</strong>" function for compressing contents. this is my codes:</p>
  
  <pre><code>&lt;?php
  ob_start("ob_gzhandler");
  ?&gt;
  &lt;html&gt;
  &lt;body&gt;
  &lt;p&gt;This should be a compressed page.&lt;/p&gt;
  &lt;/body&gt;
  &lt;/html&gt; 
  </code></pre>
  
  <p>don't throw any errors, but compressing operation not working!
  in "<strong>inspect element</strong>" isn't <strong>"content-encoding : gzip"</strong> phrase!</p>
  
  <p><a href="https://i.stack.imgur.com/QfjDW.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QfjDW.jpg" alt="enter image description here"></a></p>
  
  <p>my system information :</p>
  
  <blockquote>
    <p>Apache/2.4.23 (Win64) PHP/5.6.25 - Port defined for Apache: 80</p>
  </blockquote>