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.
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));
?>
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