PHP获取IP地址

获取客户端IP地址::
function getIp(){
if(!empty($_SERVER['HTTP_CLIENT_IP'])){
   return $_SERVER['HTTP_CLIENT_IP'];
}elseif(!empty($_SERVER['HTTP_X_FORVARDED_FOR'])){
   return $_SERVER['HTTP_X_FORVARDED_FOR'];
}elseif(!empty($_SERVER['REMOTE_ADDR'])){
   return $_SERVER['REMOTE_ADDR'];
}else{
   return "未知IP";
}
亲,试试我这段代码,获取IP的三种形式 ,应该有一款适合你,根据你的系统,上网方式选择不同的获取方式