how can I use safely of action="" in form html tag ?

Question

when we use for example action="name.php" in <form>, the haker can see the filename php and he can find file location.
however, how we can hide/encode this filename?

Answer 1

We cannot.
We could only be careful that our servers are safe (enough protections against hacking) ^^

Answer 2

lol
I know but I see the same of sites this code chagned
for example I see action="/web/", what is means this code?