PHP通过$_SERVER获取客户端用户的IP地址、浏览器、操作系统等信息

<?php

class get_client_info {

    private $remotes_keys = [
        'HTTP_X_FORWARDED_FOR',
        'HTTP_CLIENT_IP',
        'HTTP_X_REAL_IP',
        'HTTP_X_FORWARDED',
        'HTTP_FORWARDED_FOR',
        'HTTP_FORWARDED',
        'REMOTE_ADDR',
        'HTTP_X_CLUSTER_CLIENT_IP',
    ];

    //获取IP地址
    function get_client_ip() {
        foreach ($this->remotes_keys as $key) {
            if (array_key_exists($key, $_SERVER)) {
                foreach (explode(',', $_SERVER[$key]) as $ip) {
                    if ($this->isValid(trim($ip))) {
                        return $ip;
                    }
                }
            }
        }
        return '127.0.0.1';
    }

    //获取操作系统类型
    function get_client_os() {
        $agent = $_SERVER['HTTP_USER_AGENT'];
        $os = false;

        if (preg_match('/win/i', $agent) && strpos($agent, '95')) {
            $os = 'Windows 95';
        } else if (preg_match('/win 9x/i', $agent) && strpos($agent, '4.90')) {
            $os = 'Windows ME';
        } else if (preg_match('/win/i', $agent) && preg_match('/98/i', $agent)) {
            $os = 'Windows 98';
        } else if (preg_match('/win/i', $agent) && preg_match('/nt 6.0/i', $agent)) {
            $os = 'Windows Vista';
        } else if (preg_match('/win/i', $agent) && preg_match('/nt 6.1/i', $agent)) {
            $os = 'Windows 7';
        } else if (preg_match('/win/i', $agent) && preg_match('/nt 6.2/i', $agent)) {
            $os = 'Windows 8';
        } else if (preg_match('/win/i', $agent) && preg_match('/nt 10.0/i', $agent)) {
            $os = 'Windows 10'; #添加win10判断
        } else if (preg_match('/win/i', $agent) && preg_match('/nt 5.1/i', $agent)) {
            $os = 'Windows XP';
        } else if (preg_match('/win/i', $agent) && preg_match('/nt 5/i', $agent)) {
            $os = 'Windows 2000';
        } else if (preg_match('/win/i', $agent) && preg_match('/nt/i', $agent)) {
            $os = 'Windows NT';
        } else if (preg_match('/win/i', $agent) && preg_match('/32/i', $agent)) {
            $os = 'Windows 32';
        } else if (preg_match('/linux/i', $agent)) {
            $os = 'Linux';
        } else if (preg_match('/unix/i', $agent)) {
            $os = 'Unix';
        } else if (preg_match('/sun/i', $agent) && preg_match('/os/i', $agent)) {
            $os = 'SunOS';
        } else if (preg_match('/ibm/i', $agent) && preg_match('/os/i', $agent)) {
            $os = 'IBM OS/2';
        } else if (preg_match('/Mac/i', $agent) && preg_match('/PC/i', $agent)) {
            $os = 'Macintosh';
        } else if (preg_match('/PowerPC/i', $agent)) {
            $os = 'PowerPC';
        } else if (preg_match('/AIX/i', $agent)) {
            $os = 'AIX';
        } else if (preg_match('/HPUX/i', $agent)) {
            $os = 'HPUX';
        } else if (preg_match('/NetBSD/i', $agent)) {
            $os = 'NetBSD';
        } else if (preg_match('/BSD/i', $agent)) {
            $os = 'BSD';
        } else if (preg_match('/OSF1/i', $agent)) {
            $os = 'OSF1';
        } else if (preg_match('/IRIX/i', $agent)) {
            $os = 'IRIX';
        } else if (preg_match('/FreeBSD/i', $agent)) {
            $os = 'FreeBSD';
        } else if (preg_match('/teleport/i', $agent)) {
            $os = 'teleport';
        } else if (preg_match('/flashget/i', $agent)) {
            $os = 'flashget';
        } else if (preg_match('/webzip/i', $agent)) {
            $os = 'webzip';
        } else if (preg_match('/offline/i', $agent)) {
            $os = 'offline';
        } else {
            $os = '未知操作系统';
        }
        return $os;
    }

    //获取浏览器类型
    function get_client_browser() {
        $sys = $_SERVER['HTTP_USER_AGENT'];  //获取用户代理字符串
        if (stripos($sys, "Firefox/") > 0) {
            preg_match("/Firefox\/([^;)]+)+/i", $sys, $b);
            $exp[0] = "Firefox";
            $exp[1] = $b[1];  //获取火狐浏览器的版本号
        } elseif (stripos($sys, "Maxthon") > 0) {
            preg_match("/Maxthon\/([\d\.]+)/", $sys, $aoyou);
            $exp[0] = "傲游";
            $exp[1] = $aoyou[1];
        } elseif (stripos($sys, "MSIE") > 0) {
            preg_match("/MSIE\s+([^;)]+)+/i", $sys, $ie);
            $exp[0] = "IE";
            $exp[1] = $ie[1];  //获取IE的版本号
        } elseif (stripos($sys, "OPR") > 0) {
            preg_match("/OPR\/([\d\.]+)/", $sys, $opera);
            $exp[0] = "Opera";
            $exp[1] = $opera[1];
        } elseif (stripos($sys, "Edge") > 0) {
            //win10 Edge浏览器 添加了chrome内核标记 在判断Chrome之前匹配
            preg_match("/Edge\/([\d\.]+)/", $sys, $Edge);
            $exp[0] = "Edge";
            $exp[1] = $Edge[1];
        } elseif (stripos($sys, "Chrome") > 0) {
            preg_match("/Chrome\/([\d\.]+)/", $sys, $google);
            $exp[0] = "Chrome";
            $exp[1] = $google[1];  //获取google chrome的版本号
        } elseif (stripos($sys, 'rv:') > 0 && stripos($sys, 'Gecko') > 0) {
            preg_match("/rv:([\d\.]+)/", $sys, $IE);
            $exp[0] = "IE";
            $exp[1] = $IE[1];
        } else {
            $exp[0] = "未知浏览器";
            $exp[1] = "";
        }
        return $exp[0] . '(' . $exp[1] . ')';
    }

    //校验IP地址
    function isValid($ip) {
        if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) && !filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 | FILTER_FLAG_NO_PRIV_RANGE)
        ) {
            return false;
        }
        return true;
    }

}