How to implement the level-by-level invitation and timeout mechanism of PHP?

Detailed explanation of PHP implementation of level-by-level administrator invitation and timeout mechanism

Many application scenarios require an administrator to implement a step-by-step approval process. For example, user requests require multiple administrators to review in turn until someone approves them. This article will introduce in detail how to use PHP to combine message queues and timing tasks to implement this function. Especially after a request is initiated for the user, the system invites administrators A, B, C, etc. If the previous administrator does not respond within 5 minutes, the next administrator will be invited.

The core idea is to use message queues to manage task scheduling and delayed execution to ensure that the process is reliable and orderly. After the user initiates the request, the system immediately sends an invitation to administrator A and adds a delay task executed in 5 minutes to the message queue.

After 5 minutes, the message queue triggers the delay task. The task first checks whether the invitation has been accepted. If accepted, delete the task and the process ends; if not accepted, send an invitation to Administrator B and add a new 5-minute delay task, looping until all administrators are invited or someone accepts the invitation.

Message queues such as Redis or RabbitMQ can implement this function and operate with the corresponding PHP client library. The database needs to record the invitation status and timestamp of each administrator in order to track the process. At the same time, error handling and exception situations need to be considered, such as message queue processing failure or network interruption. The flow chart is as follows:

<code>发送邀请-> 加入延时队列-> 5分钟后-> 队列任务执行-> (已接受-> 结束) 或(未接受-> 邀请下一位管理员-> 加入延时队列)</code>

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