title: How to check EXIF extension is installed and enabled?
body: <p>I am using Linux server. When I am trying to run <code>exif_read_data()</code> I am getting <code>Fatal error:  Call to undefined function exif_read_data()</code> . </p>
  
  <p>Then I contacted the server provider and they say that EXIF extension is enabled in my server. but I am getting the same error.</p>
  
  <p>I have performed the <code>Graceful Server Reboot several time</code></p>
  
  <p>I have tried to run </p>
  
  <blockquote>
    <p>if (function_exists('exif_read_data'))</p>
  </blockquote>
  
  <p>and it is returning false. Also I have include <code>phpinfo()</code> in my page and nothing related to exif is listed in <code>Configure Command</code> portion.
  But why did they say it is enabled for my site. Any other possibilities???</p>