usleep
(PHP 4, PHP 5)
usleep — Delay execution in microseconds
说明
void usleep
( int $micro_seconds
)
Delays program execution for the given number of micro seconds.
参数
- micro_seconds
-
Halt time in micro seconds. A micro second is one millionth of a second.
返回值
无返回值。
更新日志
| 版本 | 说明 |
|---|---|
| 5.0.0 | This function now works on Windows systems. |
范例
Example#1 usleep() example
<?php
// Current time
echo date('h:i:s') . "\n";
// wait for 2 seconds
usleep(2000000);
// back!
echo date('h:i:s') . "\n";
?>
上例将输出：
11:13:28 11:13:30
