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;

怎么样，是不是很有用处！

看看效果：

补充–2018.3.19

#上周一 $data = date('Y-m-d H:i:s', strtotime('-1 monday')); #下周一 $data = date('Y-m-d H:i:s', strtotime('+2 monday')); #计算生日 function birthday2($birthday) { list($year, $month, $day) = explode("-", $birthday); $year_diff = date("Y") - $year; $month_diff = date("m") - $month; $day_diff = date("d") - $day; if ($day_diff < 0 || $month_diff < 0) { $year_diff--; } return $year_diff; }