How-to-know-what-type-of-browser-the-users-use

Assalamu'alaikum and selamat sejahtera

So,PHP also provide a function that detect the type of the browsers.Well,this function usually use by administrator or some organization,just to analysis what type of browser that mostly used.So,it is just a additional knowledge only.Who know,maybe this function can be very beneficial to us.

The code:

<?PHP
$browser = $_SERVER["HTTP_USER_AGENT"];
print $browser;
?>

N/NOTE:every knowledge....must been something useful to us.