How can PHP beginners effectively utilize the $_SERVER superglobal array in their code?

PHP beginners can effectively utilize the $_SERVER superglobal array by accessing its elements to gather information about the server environment, such as the current URL, user agent, and request method. This information can be used to customize the behavior of the PHP script based on the server's configuration or the user's browser.

// Example of accessing elements in the $_SERVER superglobal array
$currentURL = $_SERVER['REQUEST_URI'];
$userAgent = $_SERVER['HTTP_USER_AGENT'];

echo "Current URL: " . $currentURL . "<br>";
echo "User Agent: " . $userAgent;