How can one ensure that redirected pages display the most up-to-date information without requiring manual refresh?

When redirecting pages in PHP, the browser may cache the old content, leading to outdated information being displayed. To ensure that redirected pages display the most up-to-date information without requiring manual refresh, you can add cache-control headers to the response to instruct the browser not to cache the page. 

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

Keywords

PHP redirect header cache-control meta tags

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