To get include command working you should avoid an absolute path: i.g. not
http://somepath/somefile
But, i.g.:
../somepath/somefile
2) In localhost it would be possible this workaround:
$yourvariablepath = realpath($_SERVER["DOCUMENT_ROOT"] . "/a/path");
But this doesn’t work in remote.
3) Another workaround to include a content from a file in another absolute path could be the object tag:
<object data=”your-file-even-on-another-server” />
But an object in another page is an island, a stranger “guest”, without any sharing with the “host” page.
4) Another way (for short text) is to use javascript.