If I am setting a cookie, that means php program will create a cookie on client side in some file. This cookie will be in form of some text.
If same php program is executed for different requests from different clients, then will the same cookie be created for all different clients ? By that I mean , will all users have same cookie on their computers ?

If not, then how is that possible ? Because its the same program which is executed and creates cookie, which should be of same value for all clients.