Peter Lauri wrote:
I have some images stored in a database (only file name and other relevant
information, rest stored in file system).
I use the following html to access them:
<img src='image.php?imageid=123' />
At some pages I have the same image, so that tag will be seen on multiple
places on the same page. So what I am curious is why all of the different
images are loaded separately, instead of just recognizing that they are the
same and use a cache version?
This is the code that do all the work:
Header ("Content-type: $image_type");
readfile("files/$image");
I am a little bit lost here; kick me in the right direction if you can :)
Probably because the browser sees the ? in the URL, thinks dynamic and
doesn't cache the result. You can set caching headers to get around this
(Google for it), or if you want *all* browsers to do it right, even the
poorly implemented ones, you could modify the URL so it doesn't have the
?. I do this using the Apache MultiViews option and a URL similar to
/image/123.gif. That actually runs /image.php which pulls the
REQUEST_URI server variable apart to get the required image. Do both and
you should be good for all browsers.
-Stut
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