How to delete files regularly in php?

How to delete files regularly in php: first create a new [flag.txt] file and enter 1 or 0 in it; then [1] means to continue execution, the code is [$flag = 1;]; finally the client When the client is disconnected, the script can continue to execute in the background, the code is [ignore_user_abort();].

How to regularly delete files in php:

The following code is a simple php that regularly cleans files in a folder code.

ps: This code will continue to be executed if the website is not restarted, so it is only used for local environment testing. Please do not test on the website.

The code is as follows:

Based on an idea found on the Internet, create a flag.txt file and enter 1 or 0 in it. "0" means to stop execution, and "1" means to continue. implement. This way it can be started and stopped. 
The code is as follows:
php deletes the folder and all files under the folder
The code is as follows:
Example:Delete all ".svn" folders under a certain folder (including their contents must also be deleted).
The code is as follows:
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