php caching performance image hotlinking

Cache Hotlinked Image To Minimize Server Load

Before anyone rips me a new one...I HAVE PERMISSION to hotlink images from an external site. It works all good, however I don't like that everytime i refresh the page it pulls the images again. My server is running PHP, is there a way to cache the images once, then display them via some local code. I'm really just looking for a way to speed up the page, and not waste anyones bandwidth. Thanks in advance.

Solution

You might consider using a proxying CDN like CoralCDN.

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