php获取客户端IP地址

<?php
/**
     * 获取客户端IP地址
     * @param int $type 返回类型 0 返回IP地址 1 返回IPV4地址数字
     * @param bool $adv 是否进行高级模式获取(有可能被伪装)
     * @return mixed
     */
    function get_client_ip($type = 0, $adv = false) {
        $type       =  $type ? 1 : 0;
        static $ip  =   NULL;
        if ($ip !== NULL) return $ip[$type];
        if($adv){
            if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
                $arr    =   explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
                $pos    =   array_search('unknown',$arr);
                if(false !== $pos) unset($arr[$pos]);
                $ip     =   trim($arr[0]);
            }elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
                $ip     =   $_SERVER['HTTP_CLIENT_IP'];
            }elseif (isset($_SERVER['REMOTE_ADDR'])) {
                $ip     =   $_SERVER['REMOTE_ADDR'];
            }
        }elseif (isset($_SERVER['REMOTE_ADDR'])) {
            $ip = $_SERVER['REMOTE_ADDR'];
        }
        // IP地址合法验证
        $long = sprintf("%u",ip2long($ip));
        $ip   = $long ? array($ip, $long) : array('0.0.0.0', 0);
        return $ip[$type];
    }
最后修改:2018 年 01 月 24 日 11 : 23 AM
如果觉得我的文章对你有用,请随意赞赏

此处评论已关闭