What are the implications of not setting proper cache-control headers in PHP files?

Not setting proper cache-control headers in PHP files can result in browsers caching outdated versions of your files, leading to slower load times and potential display errors. To solve this issue, you can set cache-control headers to control how browsers cache your files and ensure that users always receive the latest version. 

<?php
// Set cache-control headers to prevent browser caching of PHP files
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1
header("Pragma: no-cache"); // HTTP 1.0
header("Expires: 0"); // Proxies
?>

Keywords

cache-control headers PHP files caching HTTP headers performance

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