What are the potential pitfalls of not properly managing browser caching in PHP?

Not properly managing browser caching in PHP can lead to slower page loading times and increased server load as the browser may request the same resources repeatedly instead of using cached versions. To solve this issue, you can set appropriate caching headers in your PHP scripts to instruct the browser on how to cache resources.

// Set caching headers to instruct the browser to cache resources for a specific period of time
$expires = 60 * 60 * 24 * 30; // 30 days
header("Cache-Control: max-age=$expires");
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $expires) . " GMT");