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
没有返回值。
更新日志
| 版本 | 说明 |
|---|---|
| 5.0.0 | This function now works on Windows systems. |
范例
Example #1 usleep() example 以上例程会输出：
<?php
// Current time
echo date('h:i:s') . "
";
// wait for 2 seconds
usleep(2000000);
// back!
echo date('h:i:s') . "
";
?>
11:13:28
11:13:30
参见
- sleep() - Delay execution
- time_nanosleep() - Delay for a number of seconds and nanoseconds
- time_sleep_until() - Make the script sleep until the specified time
- set_time_limit() - 设置脚本最大执行时间
