$year = date("Y", strtotime($yourDateVar));

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.

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

本年:2022年

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

22

创建一个helper函数并调用它

getCurrentYear();

function getCurrentYear(){
    return now()->year;
}

使用PHP date()函数。

格式是Y，大写的Y是四位数的年份。

<?php echo date("Y"); ?>

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