What to do with the delayed execution program

About the delay execution program
There is a program like this, I want to execute a program every minute, this PHP idea is how, how to write it
For example, for (i=0;i<1000;i++) {
Program logic
Here want to delay a minute to execute and then proceed to the next cycle, how do you write this or ideas, as if the PHP page has a specified time to timeout
}
------Solution--------------------
You're going to keep this page open,
Set_time_limit (0); You can make the page do not time out
Sleep (60); You can let the program sleep here for 60 seconds after the execution.

But it is not recommended to do this, mainly to see your logic, if it is to walk every minute. It is recommended to do it with crontab.
In the terminal input

Crontab-e
* * * * * * php handle.php >> handle.log
: Wq

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