直接看代码就知道啥意思了！

<?php

// 获取明天凌晨时间戳：

echo "今天凌晨的时间戳:" . strtotime(date("Y-m-d")) . PHP_EOL;

echo "一天后:" . date("Y-m-d",strtotime("+1 day")) . PHP_EOL;

echo "一周后:" . date("Y-m-d",strtotime("+1 week")) . PHP_EOL;

echo "一周零两天四小时两秒后:" . date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")) . PHP_EOL;

echo "下个星期四:" . date("Y-m-d",strtotime("next Thursday")) . PHP_EOL;

echo "上个周一:" . date("Y-m-d",strtotime("last Monday")) . PHP_EOL;

echo "一个月前:" . date("Y-m-d",strtotime("last month")) . PHP_EOL;

echo "一个月后:" . date("Y-m-d",strtotime("+1 month")) . PHP_EOL;

echo "十年后:" . date("Y-m-d",strtotime("+10 year")) . PHP_EOL;

//如果需要的是时间戳，那就更简单了：

echo strtotime("now"),"n";

echo strtotime("+0 day"),"n";

echo strtotime("10 September 2000"),"n";

echo strtotime("+1 day"),"n";

echo strtotime("+1 week"),"n";

echo strtotime("+1 week 2 days 4 hours 2 seconds"),"n";

echo strtotime("next Thursday"),"n";

echo strtotime("last Monday"),"n";

//昨天

print date('Y-m-d',strtotime('-1 day')) . PHP_EOL;

//上星期

print date('Y-m-d',strtotime('-1 week')) . PHP_EOL;

//上个月

print date('Y-m-d',strtotime('-1 month')) . PHP_EOL;

//去年

print date('Y-m-d',strtotime('-1 year')) . PHP_EOL;

12345678910111213

怎么样，是不是很有用处！

看看效果：