What are the best practices to handle browser caching issues in PHP web development?

Browser caching can sometimes cause issues with displaying updated content on a website, as the browser may store older versions of files like CSS, JavaScript, and images. To handle this issue in PHP web development, you can set appropriate caching headers to control how long the browser should cache certain files.

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