~~~ /** * get_some_day 获取n天前0点的时间戳 * @param int $some n天 * @param null $day 当前时间 * @return int|null * @author:xjw129xjt(肖骏涛) xjt@ourstu.com */ function get_some_day($some = 30, $day = null){ $time = $day ? $day : time(); $some_day = $time - 60 * 60 * 24 * $some; $btime = date('Y-m-d' . ' 00:00:00', $some_day); $some_day = strtotime($btime); return $some_day; } ~~~ var\_dump(get\_some\_day(1,time())); **输出如下：** > int(1461772800) 获取的时间戳为当前时间戳的前一天凌晨