How can caching affect the functionality of PHP forms and buttons?

Caching can affect the functionality of PHP forms and buttons by storing a cached version of the page that may not reflect the most recent form submissions or button clicks. To solve this issue, you can add a cache-control header to prevent caching of the page containing the form or buttons. 

<?php
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
?>

Keywords

Caching PHP forms Buttons Functionality Performance

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