time_sleep_until --
Make the script sleep until the specified time
說明
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: 本函數未在 Windows 平台下實現。
參數
timestamp
The timestamp when the script should wake.
返回值
若果成功則返回 TRUE,失敗則返回 FALSE。
範例
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));