print date('Y');

有关更多信息，请查看date()函数文档:https://secure.php.net/manual/en/function.date.php

只写:

date("Y") // A full numeric representation of a year, 4 digits
          // Examples: 1999 or 2003

Or:

date("y"); // A two digit representation of a year     Examples: 99 or 03

然后“echo”这个值…

http://us2.php.net/date

echo date('Y');

如果你正在使用碳PHP API扩展DateTime，你可以很容易地实现:

<？php echo Carbon::now()->年;? >

print date('Y');

有关更多信息，请查看date()函数文档:https://secure.php.net/manual/en/function.date.php

我显示版权的方式，它会自动更新

<p class="text-muted credit">Copyright &copy;
    <?php
        $copyYear = 2017; // Set your website start date
        $curYear = date('Y'); // Keeps the second year updated
        echo $copyYear . (($copyYear != $curYear) ? '-' . $curYear : '');
    ?> 
</p>    

它将输出结果为

copyright @ 2017   //if $copyYear is 2017 
copyright @ 2017-201x    //if $copyYear is not equal to Current Year.