ddantes
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Expiration of cached adaptive images
I'm trying out an adaptive image solution, wherein image requests are routed to a php file by htaccess. The php file serves the visitor with a downsized version of the image, if the native image's width exceeds the visitor's screen width. The downsized image is also cached. My question pertains to some code in the php file, which removes the cached image after a configurable length of time. So, is it desirable to keep cached images for a longer time, since other visitors with small screens might request the same image?
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If the PHP file has a cache expiration of "365", does that keep images there in perpetuity, or do they still expire after a year?