How can PHP be used to prevent a page from being loaded from the cache when the user navigates back using the browser's back button?

When a user navigates back using the browser's back button, the browser may load the previous page from the cache instead of requesting it from the server again. To prevent this, you can use PHP to send headers that disable caching for the page. 

<?php
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1.
header("Pragma: no-cache"); // HTTP 1.0.
header("Expires: 0"); // Proxies.
?>

Keywords

PHP cache control browser back button headers no-cache

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