PHP代码：得到客户端的IP_[PHP教程]

function get_client_ip()
{
if(getenv('HTTP_CLIENT_IP'))
{
client_ip = getenv('HTTP_CLIENT_IP');
}
elseif(getenv('HTTP_X_FORWARDED_FOR'))
{
client_ip = getenv('HTTP_X_FORWARDED_FOR');
}
elseif(getenv('REMOTE_ADDR'))
{
client_ip = getenv('REMOTE_ADDR');
}
else
{
client_ip = HTTP_SERVER_VAR['REMOTE_ADDR'];
}
return client_ip;
}

来源:网络