What is the usleep method in PHP?

The usleep method can be used to make the program execution waitsuspend for a specific microsecond().

1000000 micro second = 1 second

Syntax

usleep(int $microseconds): void

The microseconds argument denotes the number of microseconds the program execution needs to wait. This method does not return any value.

Code

In the code above, we did the following:

• We printed the current time using the date('h:i:s').

• We then called the usleep(3000000) method to make the program execution sleep for 3 seconds.

• We printed the time. This time will be 3 seconds after the first printed time.

Points to be noted

• Some Operating systems do not support usleep if the sleep time is more than 1 second1000000 microseconds.

• If the sleep time requirement comes in seconds, then use the sleep(seconds) method instead of the usleep(microseconds) method.

• The sleeping time may be longer on the Windows Operating system than the provided microseconds.