php之IP

常用的获取客户端的IP地址的方法:

1)

  function getRemoteIp(){

        if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){

             $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];

        }
　　　　　　elseif(isset($_SERVER['HTTP_CLIENT_IP'])){

             $ip = $_SERVER['HTTP_CLIENT_IP'];

         }
　　　　　　elseif(getenv('HTTP_X_FORWARDED_FOR')){

             $ip = getenv('HTTP_X_FORWARED_FOR');

         }
　　　　　　elseif(getenv('HTTP_CLIENT_IP')){

             $ip = getenv('HTTP_CLIENT_IP');

         }
　　　　　　elseif($_SERVER['REMOTE_ADDR']){

             $ip = $_SERVER['REMOTE_ADDR'];

         }
         else{

             $ip = null;

         }

         return $ip;
     }    

服务器(Linux)获取公网IP:

curl ifconfig.me 

curl http://members.3322.org/dyndns/getip

curl http://icanhazip.com

curl ident.me

curl http://ipecho.net/plain

curl http://whatismyip.akamai.com

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