Quote Originally Posted by CygnusFTK View Post
[04-Sep-2015 03:02:11 UTC] PHP Warning: file_get_contents(): http:// wrapper is disabled in the server configuration by allow_url_fopen=0 ...
That's caused by your server's PHP configuration disallowing the file_get_contents() function from accessing external URLs. The USPS module is simply checking for whether a newer version is available. That's the only time is uses the file_get_contents() function, so that warning can be ignored ... except that you'll have to manually check for new versions yourself and not rely on the convenience offered by a server which allows the automated checking (yours doesn't ... again probably because other accounts on your same server have been hacked and your hosting company figures this allow_url_fopen setting is something they don't know how to secure so they just shut it off instead).

The USPS module doesn't use file_get_contents() to check for shipping quotes. It uses CURL for that .. hence the curltester.php script which emulates the same communications connection to USPS that the Zen Cart shipping module itself does.