How to implement flash sale function in php

With the development of e-commerce, mobile payment and other industries, flash sale activities of products are becoming more and more popular among consumers. As a very popular and widely used development language, PHP, which is supported by background technology, is also used by more and more companies to implement flash sale activities.

So, how to implement flash sale activity in PHP? The following is a rough implementation process.

1. Design database

In MySQL, you can store related data by creating a flash sale product table and a flash sale order table. For example, the flash sale product table can store information such as product ID, name, inventory, rush sale start time, etc.; the flash sale order table can store order ID, product ID, user ID, order time and other information. The structure of these two tables facilitates our later operations.

2. Writing Cross-site Request Forgery Protection (CSRF) code

CSRF attacks are attacks against web applications that forge the identities or access credentials of legitimate users to gain access to Perform illegal operations without authorization. In PHP, in order to avoid this attack, you can use TOKEN tokens for protection. The TOKEN token can be generated when the user submits and written to the session cache. The user can bring the token when submitting. After the server receives the request, it verifies the legitimacy of the token.

3. Writing the front-end page

On the page, the name, price, inventory information of the product, and the start and end time of the rush sale will generally be displayed. In addition, a "buy now" button is also needed. After users click this button, they can perform flash sales activities.

4. Writing PHP code

When the user clicks the "Buy Now" button, the front end will send a request to the backend. After the CSRF token is verified in the background, rush purchases can be realized through the following steps:

(1) Determine whether the product is still in stock;

(2) Determine whether the user has participated in the flash sale activity;

(3) If the above conditions are met, you can create a flash sale order, reduce the inventory of the product by 1, and increase the order quantity by 1.

5. Writing a timer

Since the flash sale activity is very short, in order to prevent the product from being snapped up without limit, a timer needs to be set to limit each user's snapping up. frequency. The timer will traverse the order table within the specified time and update the status of orders that have expired or exceeded the limit time to "cancelled".

To sum up, the flash sale implementation process in PHP is relatively simple, but in actual operation, many details and issues need to be considered, such as stress testing under high concurrency conditions, optimized database design and network security. And other issues. Only by fully considering these factors can the efficiency and security of flash sales be improved.

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