Mine

<?php

class browserType{
    var $browserinfo = "Unknown";
    var $Name = "Unknown";
    var $Version = "Unknown";
    var $Platform = "Unknown";
    var $UserAgent = "Not reported";
    var $AOL = false;

    function browserType(){
        $agent = $_SERVER['HTTP_USER_AGENT'];

        $bd['platform'] = "Unknown";
        $bd['browser'] = "Unknown";
        $bd['version'] = "Unknown";
        $bd['brwcheck'] = "Unknown";
        $this->UserAgent = $agent;

        // Operating System Check
        if (eregi("win", $agent))
            $bd['platform'] = "Windows";
        elseif (eregi("mac", $agent))
            $bd['platform'] = "MacIntosh";
        elseif (eregi("linux", $agent))
            $bd['platform'] = "Linux";
        elseif (eregi("OS/2", $agent))
            $bd['platform'] = "OS/2";
        elseif (eregi("BeOS", $agent))
            $bd['platform'] = "BeOS";

        // Opera        
        if (eregi("opera",$agent)){
            $val = stristr($agent, "opera");
            if (eregi("/", $val)){
                $val = explode("/",$val);
                $bd['browser'] = $val[0];
                $val = explode(" ",$val[1]);
                $bd['version'] = $val[0];
				$bd['brwcheck'] = "op";
            }else{
                $val = explode(" ",stristr($val,"opera"));
                $bd['browser'] = $val[0];
                $bd['version'] = $val[1];
				$bd['brwcheck'] = "op";
            }

        // WebTV
        }elseif(eregi("webtv",$agent)){
            $val = explode("/",stristr($agent,"webtv"));
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "web";
        
        // MS Internet Explorer version 1
        }elseif(eregi("microsoft internet explorer", $agent)){
            $bd['browser'] = "MSIE";
            $bd['version'] = "1.0";
			$bd['brwcheck'] = "ie";
            $var = stristr($agent, "/");
            if (ereg("308|425|426|474|0b1", $var)){
                $bd['version'] = "1.5";
            }
        // NetPositive
        }elseif(eregi("NetPositive", $agent)){
            $val = explode("/",stristr($agent,"NetPositive"));
            $bd['platform'] = "BeOS";
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "np";

        // MS Internet Explorer
        }elseif(eregi("msie",$agent) && !eregi("opera",$agent)){
            $val = explode(" ",stristr($agent,"msie"));
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ie";

        // MS Pocket Internet Explorer
        }elseif(eregi("mspie",$agent) || eregi('pocket', $agent)){
            $val = explode(" ",stristr($agent,"mspie"));
            $bd['browser'] = "MSPIE";
            $bd['platform'] = "WindowsCE";
            if (eregi("mspie", $agent))
                $bd['version'] = $val[1];
            else {
                $val = explode("/",$agent);
                $bd['version'] = $val[1];
            }
			$bd['brwcheck'] = "ie";
            
        // Galeon
        }elseif(eregi("galeon",$agent)){
            $val = explode(" ",stristr($agent,"galeon"));
            $val = explode("/",$val[0]);
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ga";

        // Konqueror
        }elseif(eregi("Konqueror",$agent)){
            $val = explode(" ",stristr($agent,"Konqueror"));
            $val = explode("/",$val[0]);
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ko";

        // iCab
        }elseif(eregi("icab",$agent)){
            $val = explode(" ",stristr($agent,"icab"));
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ic";

        // OmniWeb
        }elseif(eregi("omniweb",$agent)){
            $val = explode("/",stristr($agent,"omniweb"));
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ow";

        // Phoenix
        }elseif(eregi("Phoenix", $agent)){
            $bd['browser'] = "Phoenix";
            $val = explode("/", stristr($agent,"Phoenix/"));
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ph";

        // Firebird
        }elseif(eregi("firebird", $agent)){
            $bd['browser']="Firebird";
            $val = stristr($agent, "Firebird");
            $val = explode("/",$val);
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "fb";

        // Firefox
        }elseif(eregi("Firefox", $agent)){
            $bd['browser']="Firefox";
            $val = stristr($agent, "Firefox");
            $val = explode("/",$val);
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ie";
            
      // Mozilla Alpha/Beta Versions
        }elseif(eregi("mozilla",$agent) && 
            eregi("rv:[0-9].[0-9][a-b]",$agent) && !eregi("netscape",$agent)){
            $bd['browser'] = "Mozilla";
            $val = explode(" ",stristr($agent,"rv:"));
            eregi("rv:[0-9].[0-9][a-b]",$agent,$val);
            $bd['version'] = str_replace("rv:","",$val[0]);
			$bd['brwcheck'] = "ie";

        // Mozilla Stable Versions
        }elseif(eregi("mozilla",$agent) &&
            eregi("rv:[0-9]\.[0-9]",$agent) && !eregi("netscape",$agent)){
            $bd['browser'] = "Mozilla";
            $val = explode(" ",stristr($agent,"rv:"));
            eregi("rv:[0-9]\.[0-9]\.[0-9]",$agent,$val);
            $bd['version'] = str_replace("rv:","",$val[0]);
			$bd['brwcheck'] = "ie";

        // Lynx & Amaya
        }elseif(eregi("libwww", $agent)){
            if (eregi("amaya", $agent)){
                $val = explode("/",stristr($agent,"amaya"));
                $bd['browser'] = "Amaya";
                $val = explode(" ", $val[1]);
                $bd['version'] = $val[0];
   			    $bd['brwcheck'] = "am";
            } else {
                $val = explode("/",$agent);
                $bd['browser'] = "Lynx";
                $bd['version'] = $val[1];
			    $bd['brwcheck'] = "lx";
            }

        // Safari
        }elseif(eregi("safari", $agent)){
            $bd['browser'] = "Safari";
            $bd['version'] = "";
			$bd['brwcheck'] = "sf";

        // Netscape
        }elseif(eregi("netscape",$agent)){
            $val = explode(" ",stristr($agent,"netscape"));
            $val = explode("/",$val[0]);
            $bd['browser'] = $val[0];
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ne";
        }elseif(eregi("mozilla",$agent) && !eregi("rv:[0-9]\.[0-9]\.[0-9]",$agent)){
            $val = explode(" ",stristr($agent,"mozilla"));
            $val = explode("/",$val[0]);
            $bd['browser'] = "Netscape";
            $bd['version'] = $val[1];
			$bd['brwcheck'] = "ne";
        }
        
        $bd['browser'] = ereg_replace("[^a-z,A-Z]", "", $bd['browser']);
        $bd['version'] = ereg_replace("[^0-9,.,a-z,A-Z]", "", $bd['version']);
        
        // AOL check
        if (eregi("AOL", $agent)){
            $var = stristr($agent, "AOL");
            $var = explode(" ", $var);
            $bd['aol'] = ereg_replace("[^0-9,.,a-z,A-Z]", "", $var[1]);
        }
        
        $this->Name = $bd['browser'];
        $this->Version = $bd['version'];
        $this->Platform = $bd['platform'];
        $this->AOL = $bd['aol'];
		$this->browserinfo = $bd['brwcheck'];
    }
}
?>