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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 )

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: 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

例子 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));

?>

参见

sleep()
usleep()
time_nanosleep()


add a note add a note User Contributed Notes
ssnoyes at hotmail dot com
26-Nov-2005 03:58
Implementation for < 5.1 or Windows users

<?php
if (!function_exists('time_sleep_until')) {
   function time_sleep_until($future) {
       if ($future < time()) {
           trigger_error("Time in past", E_USER_WARNING);
           return false;
       }

       sleep($future - time());
       return true;
   }
}
?>
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time_nanosleep上一级uniqid