How does PHP implement scheduled task control?

To implement scheduler task control in PHP, you need to control the scheduler task list in the PHP script. the function is as follows: set five files that need to be scheduled to run regularly (can be added, deleted, or modified). These five files run through a php file plan. php control, and then use the linux crontab to directly run this plan. PHP file to achieve the effect of running the five files at the same time. PHP implements scheduled task control.
You need to control the scheduler task list in the PHP script to implement the following functions:
Set five files that need to be scheduled to run regularly (can be added, deleted, or modified). These five files run through a php file plan. php control, and then use the linux crontab to directly run this plan. php file to run the five files at the same time.

Q: How does plan. php implement control over these five files that really require timed running ?? Directly include (require/require_once, include/include_once.

I hope my friends who are familiar with this function will tell me, thanks to ing .....

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Use this function
Ignore_user_abort (true); // The PHP script can be executed even if the Client is disconnected (such as the browser is disabled.
// Determine the trigger condition
// Execute the corresponding function (files can be loaded as needed)
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You can store the program to be automatically executed, the execution cycle, and the next execution time through the design data table. plan. php reads the table and determines whether the program can be executed. Crontab regularly executes plan. php.