just would like to confirm here whether thumbnail images that i generated
dynamically with gd is cached by browsers.

a) i have a html frontend to call the php script that does that thumbnail. this
html file, say, view.htm contains these lines:

<img src="thumb.php?image=../images/001.jpg&x=150&resize=1">

b) the thumbnailing works perfectly. but is this thumbnail cached inside my
browser. how do i find this out ?

c) if the answer to question b) above is 'No', is it a good idea to generate
thumbnails dynamically but PHYSICALLY writing it to disk (with extra checking
of course; is the thumb previously was available, is it the desired size etc

please advise.


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