Disable cache for some images

Question

I generate some images using a PHP lib.

Sometimes the browser does not load the new generated file.

How can I disable cache just for images created dynamica

Answer 1

I've used this to solve my similar problem ... displaying an image counter (from an external provider). It did not refresh always correctly. And after a random parameter was added, all works fine :)

I've appended a date string to ensure refresh at least every minute.

sample code (PHP):

$output .= "";

That results in a src link like:

http://xy.somecounter.com/?id=1234567890&1207241014