file_get_contents () pretty much does the following:
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
Since file_get_contents () is disabled, I'm sure the above will not work.
Depending on what you are trying to read, and in my experience hosts usually disable reading of deleted files, you may have other options. If you are trying to read deleted files (over the network, i.e. http, etc.), you can look in the library functions in cURL
source
share