usleep

Description

void usleep ( int micro_seconds)

The usleep() function delays program execution for the given number of micro_seconds. A microsecond is one millionth of a second.

例子 1. usleep() example
<?php // Current time echo date('h:i:s') . "\n"; // wait for 2 secondes usleep(2000000); // back! echo date('h:i:s') . "\n"; ?>
This script will output :
11:13:28 11:13:30

注: This function did not work on Windows systems until PHP 5.0.0

See also sleep() and set_time_limit().