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# time_sleep_until

(PHP 5 >= 5.1.0RC1)

time_sleep_until -- Make the script sleep until the specified time

## Description

bool time_sleep_until ( float timestamp )

This function will make the script sleep until the specified timestamp. If the specified timestamp is in the past, time_sleep_until() will generate a `E_WARNING` and return `FALSE`.

> 注: ��Ƥ�A�Ω� Windows �x�C

## Parameters

timestamp

  The timestamp when the script should wake.

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

## Return Values

�\�^��`TRUE`�Ѧ^��`FALSE`�C

## �d��

範例 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)); ?>`

## �Ѧ�

sleep()
usleep()
time_nanosleep()

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