usleep

Delay execution in microseconds (PHP 3, PHP 4, PHP 5)
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 1161. 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
注意:

This function did not work on Windows systems until PHP 5.0.0

See also sleep() and set_time_limit().