Which properties?
Generally PHP resides on your server and it has nothing to do with the client ( web browser ) .
You can get only what browser sends you : referrer and user agent string .
There's some php function get_browser() that will get some info based on user agent string (PHP: get_browser - Manual) .

But generally Javascript is the language that talks directly with your browser, so you might gather the required information with javascript and then send it to server by ajax.

Here's the code

<?php
echo $_SERVER['HTTP_USER_AGENT'] . “\n\n”;
$browser = get_browser();
print_r($browser);
?>