building a betting page

Hi everyone,

I want to build a betting page on my own but I don't know which software I should use. google tells me that there are 213497528 possibilities.

e.g. here

Can you tell me which software I should use?

The requirements are:

- it should be scalable (some users at the beginning, hopefully a lot more in the future)
- at first the bets are not with real money but of course in the future, so it should be safe (I don't need legal advise just technical)

thanks for your help

Poster :