What are the best practices for setting cache-control headers in PHP to prevent caching?

Setting cache-control headers in PHP is crucial to prevent caching of sensitive or dynamically changing content. To prevent caching, you can set the cache-control header to 'no-cache' which instructs the browser to always validate a cached resource with the server before using it. Additionally, you can set the 'pragma' header to 'no-cache' for older browsers that do not support the cache-control header. 

<?php
header("Cache-Control: no-cache, no-store, must-revalidate");
header("Pragma: no-cache");
header("Expires: 0");
?>

Keywords

cache-control headers PHP prevent caching best practices HTTP headers

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