先来了解一个变量的含义:
$_SERVER['REMOTE_ADDR']: 浏览当前页面的用户计算机的 ip 地址
$_SERVER['HTTP_CLIENT_IP']: 客户端的 ip
$_SERVER['HTTP_X_FORWARDED_FOR']: 浏览当前页面的用户计算机的网关
$_SERVER['HTTP_X_REAL_IP']:nginx 代理模式下, 获取客户端真实 IP
- /**
- * 获取客户端 IP 地址
- */
- function real_ip()
- {
- $ip = $_SERVER['REMOTE_ADDR'];
- if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
- foreach ($matches[0] AS $xip) {
- if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
- $ip = $xip;
- break;
- }
- }
- } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
- $ip = $_SERVER['HTTP_CLIENT_IP'];
- } elseif (isset($_SERVER['HTTP_CF_CONNECTING_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CF_CONNECTING_IP'])) {
- $ip = $_SERVER['HTTP_CF_CONNECTING_IP'];
- } elseif (isset($_SERVER['HTTP_X_REAL_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_REAL_IP'])) {
- $ip = $_SERVER['HTTP_X_REAL_IP'];
- }
- return $ip;
- }
总结
来源: https://www.jb51.net/article/150563.htm