Image Caching

[Spudgun]

Hi
I've got pages that displays an image with a different colour background depending on the page selected. Unfortunately, the page is caching the images even with the relevant meta tags in place. Is there any function I can use to force the image to be refreshed? (The images are created using GD)
Thanks in advance

[BuzzLY]

That's the thing about browsers -- they try to be as efficient as possible. If you are loading a graphic file from the same site that has the same name, it will load it from the user's cache to make the page load faster.

You have a couple of options. First of all, you could make the background color transparent, put the image in a table cell, and change the background color of the cell. If the image is too complex for that, you could give it a different name every time you create the image, so that the user is forced to load it each time. It's not as efficient, but it will do what you are trying to do.

My suggestion would be to come up with some other way of showing the user he's on a new page. Your method does not seem very efficient at all.

[yuraupt]

Hello guys,

you can try this:
<img src="image.jpg?kill_cache=<?php echo time(); ?>">

But in this case your users would download the image everytime they visit the page.

As I understand your problem, you generate background image depending on the current page and it looks like that:

<img src="get_image.php">

Then just add some parameter to be unique per page, like page id, file name or wahtever:

<img src="get_image.php?page=index.php">