What role does browser caching play in optimizing PHP performance?

Browser caching plays a crucial role in optimizing PHP performance by storing static resources like images, CSS, and JavaScript files on the user's browser. This reduces the number of requests made to the server, resulting in faster page loading times. To enable browser caching in PHP, you can set the cache-control header to specify how long the browser should cache resources. 

<?php
// Set cache control header to enable browser caching
$expires = 60 * 60 * 24 * 30; // 30 days
header("Cache-Control: max-age=".$expires);

Keywords

browser caching optimizing PHP performance HTTP headers cache-control

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