If you are updating the vbookie.php script I will recommend a few changes:
1. Make sure the odds are determined/queried and set from the database and not client-end sent form variables as is the case at present by default. The odds are easily forged by default and makes cheating the easiest thing in the world.
2. Place a restriction on the frequency a user can place bets. At least no more than one bet every 5-10 seconds. If you don't, we've found it's possible to hammer the server in quick succession with bets and users to acquire an insane amount of money through a bug of some kind. I've seen this replicated on a number of vbookie installations. Since we placed a small restriction on frequency of bets, no user has earned a crazy amount of money on our sites.
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