What is the purpose of using $_SERVER['REQUEST_URI'] in PHP?

$_SERVER['REQUEST_URI'] is used in PHP to retrieve the current URL or URI that is being accessed by the user. This can be useful for various purposes such as tracking the current page, creating dynamic navigation menus, or redirecting users to different pages based on the URL. By using $_SERVER['REQUEST_URI'], you can easily access and manipulate the current URL within your PHP code.

$current_url = $_SERVER['REQUEST_URI'];
echo "Current URL: " . $current_url;