Shulou(Shulou.com)05/31 Report--

This article is to share with you what the solution for PHP concurrency scenarios is, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

In the concurrency scenarios such as second kill and panic buying, the phenomenon of overselling may occur, and there is no native concurrency solution in PHP language, so we need to use other ways to achieve concurrency control.

A list of common solutions are:

Using the queue, an additional process processing queue is set up, and the concurrent requests are put into the queue, and the concurrency problem does not exist if the additional processes are processed serially, but this method will not be discussed in this article because of the additional process support and the serious processing delay. Making use of the transaction characteristics of the database to do atomic updates, this method needs to rely on the transaction characteristics of the database. With the help of file exclusive lock, when processing an order request, use flock to lock a file, and successfully get the lock to process the order.

First, make use of the transaction characteristics of Redis

Redis transactions are atomic operations that ensure that the data is not modified by other concurrent processes during order processing.

Sample code:

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