PHP - Get_browser()

I recently read a forum posting regarding detecting the browser being used by the user. The following is a quote from that post;

Quote from: Daniel0 on July 09, 2006, 01:45:10 AM

Code: [Select]
$browser = get_browser(null, true);
$browser = $browser['parent'];
This would get the browser name and version (i.e. Firefox 1.5).



How is this applied in code to 'echo' the browser, and is this the best execution of browser detection?