<?php
    var_dump($_SERVER['HTTP_USER_AGENT']);
    //string(150) "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.80 Safari/537.36 Core/1.47.277.400 QQBrowser/9.4.7658.400"
    function GetBrowser(){
        $br = $_SERVER['HTTP_USER_AGENT'];
        if(!empty($br)){
            if (preg_match('/MSIE/i',$br)) {
                $br = 'MSIE';
            }elseif (preg_match('/Firefox/i',$br)) {
                $br = 'Firefox';
            }elseif (preg_match('/Chrome/i',$br)) {
                $br = 'Chrome';
            }elseif (preg_match('/Safari/i',$br)) {
                $br = 'Safari';
            }elseif (preg_match('/Opera/i',$br)) {
                $br = 'Opera';
            }else {
                $br = 'Other';
            }
            return $br;
        }else{
            return "获取浏览器信息失败！";
        } 
    }

    function GetOs(){
        $OS = $_SERVER['HTTP_USER_AGENT'];
        if(!empty($OS)){
            if(preg_match('/win/i',$OS) && preg_match('/nt 5.1/i', $OS)){
                $OS = 'Windows XP';
            }elseif(preg_match('/win/i',$OS) && preg_match('/nt 5.2/i', $OS)){
                $OS = 'Windows2003';
            }elseif(preg_match('/win/i',$OS) && preg_match('/nt 5/i', $OS)){
                $OS = 'Windows2000';
            }elseif(preg_match('/win/i',$OS) && preg_match('/nt 6.1/i', $OS)){
                $OS = 'Windows7';
            }elseif(preg_match('/win/i',$OS) && preg_match('/nt 10.0/i', $OS)){
                $OS = 'Windows10';
            }elseif(preg_match('/win/i',$OS) && preg_match('/nt 6.3/i', $OS)){
                $OS = 'Windows8.1';
            }elseif (preg_match('/android/i',$OS)) {
                $OS = 'Android';
            }elseif (preg_match('/mac/i',$OS)) {
                $OS = 'MAC';
            }elseif (preg_match('/linux/i',$OS)) {
                $OS = 'Linux';
            }elseif (preg_match('/unix/i',$OS)) {
                $OS = 'Unix';
            }elseif (preg_match('/bsd/i',$OS)) {
                $OS = 'BSD';
            }else {
                $OS = 'Other';
            }
            return $OS;
        }else{
            return "获取访客操作系统信息失败！";
        }   
    }
    echo GetBrowser();
    echo GetOs();
?>