How to make a script launched by cron to sleep for X seconds?

I 'm improving a cron job which loops a lot of stuff and updates my database. I would like to make ut wait, let's say 30 seconds every 100 requests.

Something like:

loop{
     loop{
          query();
     }
     wait(3000); // wait 3 seconds and continue
}

Can I do that?开发者_如何学运维 If so, is it possible the the cron job times out?

Thanks!

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To make a configurable pause, use the sleep function.

When launching PHP from the command line (as cron does), the max_execution_time is infinite by default, so you won't have to worry about timeouts unless you change it yourself.

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You can set execution time limit to infinity with this:

set_time_limit(0);

And then you can use sleep() function to pause the execution.

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See the sleep() function. It lets you wait for X seconds.

PS: you may need to also use set_time_limit().

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// sleep for 10 seconds
sleep(10);

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Use sleep.