time_sleep_until

(PHP 5 >= 5.1.0RC1)

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

如果成功则返回 TRUE,失败则返回 FALSE

错误/异常

If the specified timestamp is in the past, this function will generate a E_WARNING.

范例

例 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(time()+0.2));

?>

注释

注意: All signals will be delivered after the script wakes up.

注意: 本函数未在 Windows 平台下实现。

参见

sleep()
usleep()
time_nanosleep()