Develop scheduled task applications using Yii framework

With the development of the Internet, more and more applications need to implement scheduled tasks, such as message push, regular email sending, data cleaning, etc. In response to these needs, the Yii framework provides complete scheduled task support. This article will introduce how to use the Yii framework to develop scheduled task applications.

1. Introduction to Yii Framework

Yii (pronounced [yiː], meaning "Yes It Is!") is a high-performance PHP framework based on MVC (Model-View -Controller) design pattern development. The Yii framework has the advantages of simplicity, efficiency, security, and scalability, and is currently one of the most popular PHP frameworks.

The Yii framework provides a variety of components and tools that can be used to build different types of applications. Among them, the scheduled task component of the Yii framework can help developers implement various scheduled tasks, such as scheduled backup, scheduled cleanup, scheduled email sending, etc.

2. The scheduled task component of the Yii framework

The scheduled task component of the Yii framework is based on the CronTab system. CronTab is a time-based task scheduler that allows users to run at a specified time. command or script. The scheduled task component of the Yii framework supports a syntax similar to CronTab, which can be used to define various scheduled tasks.

In the Yii framework, you can obtain the scheduled task component instance through the following code:

$task = Yii::$app->task;

Through the above code, developers can access the scheduled task component of the Yii framework. Next, we will introduce how to use the scheduled task component to write a scheduled task application.

3. Yii framework scheduled task application example

Next, we will use an example to demonstrate how to use the Yii framework to develop a scheduled task application. This application is mainly used to clean expired data regularly.

1. Create Yii Application

First, we need to create a Yii application. You can create a basic Yii application through the following command:

composer create-project --prefer-dist yiisoft/yii2-app-basic basic

This command will create an application based on the Yii framework. You can open http://localhost/basic in the browser to view the application. Effect.

2. Add a scheduled task

Next, we need to add a scheduled task. You can edit the config/console.php file of the Yii application and add the following code:

return [
    // ...
    'components' => [
        // ...
        'task' => [
            'class' => 'yiiconsolewidgetsSchedule',
            'tasks' => [
                // 每天凌晨2点清理1个月前的数据
                [
                    'pattern' => '0 2 * * *',
                    'route' => ['clean', '-m1'],
                ],
            ],
        ],
    ],
    // ...
];

In the above code, we defined a scheduled task that will run at 2 a.m. every day and clean up 1 month ago The data. This task is implemented through the Yii framework's scheduled task component, which is defined based on the CronTab syntax.

Next, we need to define the command to clean the data. You can add the following code to the console/controllers/TaskController.php file:

<?php

namespace consolecontrollers;

use Yii;
use yiiconsoleController;

class TaskController extends Controller
{
    public function actionClean($m = 1)
    {
        $targetTime = strtotime("-{$m} months");
        $query = Todo::find()->where(['<', 'created_at', $targetTime]);
        $count = $query->count();
        $query->delete();

        Yii::info("Cleaned up {$count} expired items.", 'task');
    }
}

In the above code, we define a clean action, which will delete all expired data 1 month ago. In this command, we use the query builder of the Yii framework to perform database operations, and also use the log component provided by the Yii framework to record the results of cleaning the data.

3. Run scheduled tasks

Finally, we need to run scheduled tasks. You can start the Yii console application through the following command:

php yii scheduled/run

This command will start the Yii console application and run the scheduled task. During the running process, the system will determine whether the task needs to be executed based on the CronTab syntax. If the task needs to be executed, the specified command will be called to complete the task.

4. Summary

This article introduces how to use the Yii framework to develop scheduled task applications. Through the scheduled task component of the Yii framework, developers can easily implement the function of scheduled tasks, and at the same time, they can also write various scheduled task commands based on the powerful functions of the Yii framework.

In short, if you need to write a scheduled task application, you may consider using the Yii framework. I believe it will bring you a better development experience.

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