How to realize lucky draw Mini Program by PHP

This article mainly introduces "how to achieve lucky draw Mini Program by PHP". In daily operation, I believe many people have doubts about how to achieve lucky draw Mini Program by PHP. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts about "how to achieve lucky draw Mini Program by PHP". Next, please follow the editor to study!

The raffle algorithm needs to meet the following requirements:

1. You can control the probability of winning the lottery.

two。 Have randomness

3. It is best to control the number of prizes.

4. Limit the number of lotteries according to the user's ID or ip, mobile phone number, QQ number and other conditions.

At the initial stage, according to the information on the Internet, a phased extraction method is adopted. Let's take a look at the overall procedure:

The program is completed in the ThinkPHP framework, using some of the framework's own class libraries and functions, I will explain one by one, the controller part:

The code is as follows