以我为例，wordpress网站页脚的版权声明需要更新。

想法很简单，但涉及的步骤比预期的要多。

Open footer.php in your theme's folder. Locate copyright text, expected this to be all hard coded but found: <div id="copyright"> <?php the_field('copyright_disclaimer', 'options'); ?> </div> Now we know the year is written somewhere in WordPress admin so locate that to delete the year written text. In WP-Admin, go to Options on the left main admin menu: Then on next page go to the tab Disclaimers: and near the top you will find Copyright year: DELETE the © symbol + year + the empty space following the year, then save your page with Update button at top-right of page. With text version of year now delete, we can go and add our year that updates automatically with PHP. Go back to chunk of code in STEP 2 found in footer.php and update that to this: <div id="copyright"> &copy;<?php echo date("Y"); ?> <?php the_field('copyright_disclaimer', 'options'); ?> </div> Done! Just need to test to ensure changes have taken effect as expected.

这对很多人来说可能不是同样的情况，但是我们在相当多的客户站点中遇到过这种模式，并且认为最好在这里记录。

随着PHP朝着更面向对象的方向发展，我很惊讶这里没有人引用内置的DateTime类:

$now = new DateTime();
$year = $now->format("Y");

或者在实例化时使用类成员访问的一行程序(php>=5.4):

$year = (new DateTime)->format("Y");

$dateYear = date('Y');
echo "Current Year: $dateYear";

本年:2022年

$dateYear = date('y');
echo $dateYear;

22

顺便说一句……网站版权展示有几种合适的方式。有些人倾向于让事情变得多余，例如:版权©具有相同的含义。重要的版权部分包括:

**Symbol, Year, Author/Owner and Rights statement.** 

使用PHP + HTML:

<p id='copyright'>&copy; <?php echo date("Y"); ?> Company Name All Rights Reserved</p>

or

<p id='copyright'>&copy; <?php echo "2010-".date("Y"); ?> Company Name All Rights Reserved</p

要使用PHP的日期函数获取当前年份，你可以像这样传入“Y”格式字符:

//Getting the current year using
//PHP's date function.

$year = date("Y");
echo $year;

上面的例子将打印出当前年份的完整的4位数字表示。

如果你只想检索2位数格式，那么你可以使用小写的“y”格式字符:

$year = date("y");
echo $year;
1
2
$year = date("y");
echo $year;

上面的代码片段将打印20而不是2020年，或者打印19而不是2019年，等等。

<?php
$time_now=mktime(date('h')+5,date('i')+30,date('s'));
$dateTime = date('d_m_Y   h:i:s A',$time_now);

echo $dateTime;
?>