如果是一个url，PHP头函数修改查询字符串

It is very strange to see that php header function modifying query string if it is an URL. I used header function like this

header('Location: http://www.example.com/account-type?goto=http://www.google.com/hello');
This is redirecting to http://www.example.com/account-type?goto=http/hello modified query string

And if I use relative URL

header('Location: /account-type?goto=http://www.google.com/hello');
this will redirect to http://www.example.com/account-type?goto=http://www.google.com/hello

Can anyone tell me how to fix this issue?

I guess it's just a problem of encoding. Try this:

$url = urlencode('http://www.google.com/hello');
header('Location: http://www.example.com/account-type?goto=' . $url);