(PHP 4, PHP 5, PHP 7, PHP 8)
usleep — Delay execution in microseconds
microsecondsHalt time in microseconds. A microsecond is one millionth of a second.
Зауваження: Values larger than
1000000(i.e. sleeping for more than a second) may not be supported by the operating system. Use sleep() instead.
Зауваження: The sleep may be lengthened slightly (i.e. may be longer than
microseconds) by any system activity or by the time spent processing the call or by the granularity of system timers.
Не повертає значень.
Приклад #1 usleep() example
<?php
// Current time
echo (new DateTime('now'))->format('H:i:s.v'), "\n";
// wait for 2 milliseconds
usleep(2000);
// back!
echo (new DateTime('now'))->format('H:i:s.v'), "\n";
// wait for 30 milliseconds
usleep(30000);
// back again!
echo (new DateTime('now'))->format('H:i:s.v'), "\n";
?>Поданий вище приклад виведе:
11:13:28.005 11:13:28.007 11:13:28.037