获取客户端IP地址

function GetIp()

{

if (isset($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]))

{

$ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];

}

elseif (isset($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]))

{

$ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"];

}

elseif (isset($HTTP_SERVER_VARS["REMOTE_ADDR"]))

{

$ip = $HTTP_SERVER_VARS["REMOTE_ADDR"];

}

elseif (getenv("HTTP_X_FORWARDED_FOR"))

{

$ip = getenv("HTTP_X_FORWARDED_FOR");

}

elseif (getenv("HTTP_CLIENT_IP"))

{

$ip = getenv("HTTP_CLIENT_IP");

}

elseif (getenv("REMOTE_ADDR"))

{

$ip = getenv("REMOTE_ADDR");

}

else

{

$ip = "127.0.0.1";

}

if(strpos($ip,',')>0)

{

$po = explode(',',$ip);

$ip = $po[0];

}

return $ip;

}