time_sleep_until

Make the script sleep until the specified time (PHP 5 >= 5.1.0RC1)
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.

注意:

本函数未在 Windows 平台下实现。

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

范例

例 1159. 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));

?>