Thanks for your response!
The Request::forge doesn't seem to do anything and honestly that doesn't really make sense to me.
Are you sure these are ways for me to _save_ the image to my server? I basically need to find a function or method that allows me to do: Cache::set('my_image_name', 'external_image_url'); so that I can begin to save these images locally so I don't have to pull from some external source every time I want to display a movie image.
You need to download the image first, it's pretty pointless to cache the url.
The most obvious method to fetch it is file_get_contents(), but not every host has that enabled. Alternative is curl, which can be used to fetch remote data without problems.
Note that if you store it in cache instead of on disk, you need a controller that serves up the image, instead of a direct link to the image on disk.