Nginx 反向代理后如何获取真实客户端 IP

1 vhost 中的虚拟主机任意处
    location /api { 
            rewrite  ^/api/(.*)$ /api/$1 break;
            proxy_pass   https://***.*********.com;
    }
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

2 如果有报错
Starting nginx: nginx: [warn] could not build optimal proxy_headers_hash, you should increase either proxy_headers_hash_max_size: 512 or proxy_headers_hash_bucket_size: 64; ignoring proxy_headers_hash_bucket_size

    nginx.conf 下的http 模块下设置
    proxy_headers_hash_max_size 51200;
    proxy_headers_hash_bucket_size 6400;

3 代码里面获取
   $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];Copy