How can cache options from the browser affect the loading of data in PHP applications?

Cache options from the browser can affect the loading of data in PHP applications by storing previously loaded resources locally, reducing the need to fetch them again from the server. This can improve loading times and reduce server load. To ensure that the browser fetches the latest data from the server, developers can set appropriate cache-control headers in their PHP application.

// Set cache-control headers to ensure browser fetches latest data
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");