Caching problem loading a url with file_get_contents

Hi,

I am loading another web page (from a different server) using file_get_contents with a url for filename. Works well, but it isn't updating as that web page changes. I assume that the loaded page is being cached somewhere. How can I clear that cache, given that I have no control of the web page I am trying to load (and have no idea at which point the caching is being done!) ?

Thanks.

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