browser.detect.php

<?php 

$browsers 	= array('firefox','chrome','safari','opera','msie');
$browser 	= new stdClass();
preg_match('#('.implode('|',$browsers).')(/| )([^ ]+)#i',$_SERVER['HTTP_USER_AGENT'],$match);
$browser->version 	= round((int)$match[3]);
$match 			= strtolower($match[1]);
	
foreach($browsers as $val)
{
	$browser->{$val} = ($match == $val ? TRUE : FALSE);
}
	
if($browser->safari || $browser->opera)
{
	preg_match('#version/([^ ]+)#i',$_SERVER['HTTP_USER_AGENT'],$match);
	$browser->version = round((int)$match[1]);
}
	
$browser->webkit 	= ($browser->chrome || $browser->safari ? TRUE : FALSE);

var_dump($browser);
?>