With the development of websites or applications, the amount of data becomes larger and larger, and the speed of processing data becomes slower and slower. Moreover, too much expired data takes up a lot of space, which will degrade the performance of the database and cause the website or application to become slow. Therefore, it becomes very important and necessary to clear expired data regularly. In the Laravel framework, you can use Laravel's expiration delete function to solve this problem.

Laravel's expired deletion function is very powerful, it can automatically delete expired data without manual intervention. This can help the database run more efficiently and optimize the performance of the website or application. Let’s take a closer look at Laravel’s expiration deletion function.

Laravel's expiration deletion function mainly includes two aspects: scheduled expiration deletion and automatic update of expiration time. Below we will introduce these two aspects respectively:

1. Scheduled expiration deletion
   In Laravel, we can use scheduled tasks to automatically delete expired data. Scheduled tasks can be configured in Laravel's task scheduler. For example, if we want to automatically delete data older than 7 days, we can enter the following command in Laravel's console:

php?artisan?schedule:run

Then, we need to define a scheduled task in Laravel's task scheduler. The specific steps are as follows:

①Open the app/Console/Kernel.php file;
②Add the following code in the schedule function:

$schedule->call(function?()?{
????DB::table('table_name')->where('created_at',?'<&#39;, Carbon::now()->subDays(7))->delete();
})->daily();

The function of this line of code is: Execute a task at 0 o'clock and delete data older than 7 days. Among them, table_name is the name of the table where you want to delete data. Carbon is a date and time library that allows us to manipulate dates and times more conveniently. This task will be executed once every day at 0:00, and all data older than 7 days will be automatically deleted.

2. Automatic update of expiration time
   In addition to automatically deleting expired data, Laravel can also automatically update expiration time. For example, our app has a membership feature, and each member has a membership period of 30 days. When the membership period is about to expire, we hope that the system can automatically renew the member's membership period so that they can continue to use our services.

Laravel provides the Carbon library to manipulate time, which can easily update the expiration time automatically. The specific steps are as follows:

①Open the app/Models folder;
②Find the model file you want to automatically update with the expiration time;
③Add the $dates attribute of the model that you want to automatically update. The date field:

protected?$dates?=?['expired_at'];

For example, in the membership model, we can write like this:

protected?$dates?=?['expire_time'];

In this way, we create a $dates attribute to tell Laravel that this model has a datetime type expire_time field, it should be managed using Carbon class.

④Open your model file and use the following code to update the expiration time:

public?function?updateExpiredTime()
{
????$this->expired_at?=?Carbon::now()->addDays(30);
????$this->save();
}

In this method, we use the addDay() method in the Carbon class to increase the expiration time by 30 days . Next, we save the expiration time into the model so that it updates automatically. In this way, we successfully implemented the automatic update of the expiration time.

In short, Laravel's expired deletion function is very powerful and can automatically delete expired data to improve database performance and the response speed of the website or application. At the same time, it can also automatically update the expiration time to control the processing of expiration time. The above is a detailed explanation of Laravel's expiration deletion function in this article. I hope it can help you better use Laravel to process data.

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