php - file_get_contents grab remote page, content is not updated

Question

In my localhost PHP file test.php, I use php function file_get_contents to grab a forum index page.

echo file_get_contents('http://www.XX.com/forum.php');

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

Answer 1

There are a number of possible reasons:

• You are behind a caching proxy server and are receiving a cached copy of the page
  • This can exist at the network or server level
• The target site detects such requests and provides cached versions for performance or security reasons
• Your browser has cached the output of your script.

You will need to examine your configuration, talk to your network administrator, or check your own browser's cache to find the source of the problem.