php将当前时间戳增加一年(year)

echo strtotime("+1 year");//返回时间戳, 如果要转换成一般时间格式还需要下面的函数
echo date('Y-m-d H:i:s', strtotime("+1 year"));
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同理,不仅仅可以+year 还可以是天, 月日都可以的,如下代码:
<?php
echo strtotime("now"), "\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";
?>