Nginx反向代理导致PHP获取不到正确的HTTP_HOST,SERVER_NAME,客户端IP的解决方法

upstream abc.com {
        server 10.141.8.55:8005;
        server 10.141.8.55:8006;
}
server {
        listen 80;
        server_name www.xxx.com;
        log_not_found off;
        access_log  /var/log/nginx/html-access.logmain;
        charset utf-8;
        location /{
                proxy_pass http://abc.com;}
}

upstream abc.com {
        server 10.141.8.55:8005;
        server 10.141.8.55:8006;
}
server {
        listen 80;
        server_name www.xxx.com;
        log_not_found off;
        access_log  /var/log/nginx/html-access.logmain;
        charset utf-8;
        location /{
                proxy_pass http://abc.com;
proxy_set_header    Host             $host;
                proxy_set_header    X-Real-IP        $remote_addr;
                proxy_set_header    X-Forwarded-For  $proxy_add_x_forwarded_for;
                proxy_set_header    HTTP_X_FORWARDED_FOR $remote_addr;
                proxy_redirect      default;
        }
}