PHP获取用户Ip

 

function getIP() { //获取IP     if ($_SERVER["HTTP_X_FORWARDED_FOR"])         $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];     else if ($_SERVER["HTTP_CLIENT_IP"])          $ip = $_SERVER["HTTP_CLIENT_IP"];     else if ($_SERVER["REMOTE_ADDR"])         $ip = $_SERVER["REMOTE_ADDR"];     else if (getenv("HTTP_X_FORWARDED_FOR"))          $ip = getenv("HTTP_X_FORWARDED_FOR");     else if (getenv("HTTP_CLIENT_IP"))         $ip = getenv("HTTP_CLIENT_IP");     else if (getenv("REMOTE_ADDR"))          $ip = getenv("REMOTE_ADDR");     else         $ip = "Unknown";     return $ip; }