time_sleep_until
(PHP 5 >= 5.1.0)
time_sleep_until — Make the script sleep until the specified time
说明
bool time_sleep_until ( float $timestamp )
Makes the script sleep until the specified timestamp.
参数
- timestamp
-
The timestamp when the script should wake.
返回值
成功时返回 TRUE， 或者在失败时返回 FALSE.
更新日志
| 版本 | 说明 |
|---|
错误/异常
If the specified timestamp is in the past, this function will generate a E_WARNING.
范例
Example #1 A time_sleep_until() example
<?php
//returns false and generates a warning
var_dump(time_sleep_until(time()-1));
// may only work on faster computers, will sleep up to 0.2 seconds
var_dump(time_sleep_until(microtime(true)+0.2));
?>
注释
Note: All signals will be delivered after the script wakes up.
参见
- sleep() – Delay execution
- usleep() – Delay execution in microseconds
- time_nanosleep() – Delay for a number of seconds and nanoseconds
- set_time_limit() – 设置脚本最大执行时间
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