usage of sha1() function

[davidklonski]

Hello

I have a theoretical question regarding how sha1() works.
Is it theoretically possible for sha1() to return the same output for two different input strings?

thanks

[Weedpacket]

Of course: there are an infinite number of possible input strings, but only a finite number of possible sha1 hashes. Ergo, there must be at least one hash that is the result of an infinite number of different input strings.