PHP ini file_get_contents external url

Question

I use following PHP function:

file_get_contents(\'http://example.com\');

Whenever I do this on a certain server, the result is empty. When I do

Answer 1

The is related to the ini configuration setting allow_url_fopen.

You should be aware that enable that option may make some bugs in your code exploitable.

For instance, this failure to validate input may turn into a full-fledged remote code execution vulnerability:

copy($_GET["file"], ".");