How to disable caching 100%

[edove]

I am currently using:\[code\]header("Cache-Control: no-store, no-cache, must-revalidate");header("Cache-Control: post-check=0, pre-check=0", false);header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");\[/code\]and\[code\]<meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="-1"><meta http-equiv="pragma" content="no-cache">\[/code\]Yet it still caches