Originally Posted by stymiee

Change the name of the file each time. That will prevent caching.

Thanks stymiee !

but do you think this is an efficient solution? The number of files will get increasing and that need to be deleted.

Is it possible to disable the cahing?

Regards!

Originally Posted by stymiee

There's no reliable way to disable caching. You can send send out headers to prevent caching but I've found this to not be 100% effective. A better solution might be to use PHP to output the image. Then you can append a timestamp to the filename to make it look unique: <img src="/images/chart.php?1091343214">.

The php code in chart.php would look like this:

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<?php
    header('Content-type: image/gif');
    $fn = fopen("./chart.gif", "r");
    fpassthru($fn); 
?>

<?php header('Content-type: image/gif'); $fn = fopen("./chart.gif", "r"); fpassthru($fn); ?>