As you probably know from a previous post I retrieve images from my database.
I noticed images that are sent to the user using my php-script are not cached as normal images.
How can tell the browser (and proxy's) that the image called with "image.php?id=234" will be the same image for the rest of eternity?? and that they may cache the file?
I am 100% sure that the image behind an id won't change. so "image.php?id=234" will always be the same.