file_get_contents grab remote page, content is not updated
<p>In my localhost PHP file test.php, I use php function file_get_contents to grab a forum index page.</p>

<pre><code>echo file_get_contents('http://www.XX.com/forum.php');
</code></pre>

<p>when the forum data, sunch as  posting , member changes, I refresh the test.php, content is hasn't changed, I want to know why?</p>
