emlog 添加文章时间声明代码

在模版文件options.php 添加开关按钮，在里面定义了一个单选按钮字段，用于选择是否打开内容失效提醒功能。默认情况下，该功能是被打开的。

'tips' => array(
    'type' => 'radio',
    'name' => '内容失效提醒',
    'values' => array(
        '1' => '打开',
        '2' => '关闭',
    ),
    'default' => '1',
),

在echo_log.php文件，内容上访位置添加代码：

<?php if(_g('tips')==1): ?>

   <?php 
    function convertSecondsToYearsMonths($seconds) {  
    $years = floor($seconds / (365 * 60 * 60 * 24));  
    $seconds %= 365 * 60 * 60 * 24;  
    $months = floor($seconds / (30 * 60 * 60 * 24)); // 假设每月平均30天  
    return [  
        'years' => $years,  
        'months' => $months  
    ];  
    }

    $time = strtotime(gmdate('Y-n-j', $date));  
    $now = time();  
    $t = $now - $time;  

    if ($t > 60*60*24*365) {  
    $yearsMonths = convertSecondsToYearsMonths($t);  
    $years = $yearsMonths['years'];  
    $months = $yearsMonths['months'];  
    ?> 

      <div class="article-statement">
        <div class="article-time-tips">
          <div class="title-tips">
            <svg class="icon-tips" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="20" height="20">
              <path d="M0 512c0 282.778 229.222 512 512 512s512-229.222 512-512S794.778 0 512 0 0 229.222 0 512z" fill="#FF8C00" fill-opacity=".51"></path>
              <path d="M462.473 756.326a45.039 45.039 0 0 0 41.762 28.74 45.039 45.039 0 0 0 41.779-28.74h-83.541zm119.09 0c-7.73 35.909-39.372 62.874-77.311 62.874-37.957 0-69.598-26.965-77.33-62.874H292.404a51.2 51.2 0 0 1-42.564-79.65l23.723-35.498V484.88a234.394 234.394 0 0 1 167.492-224.614c3.635-31.95 30.498-56.815 63.18-56.815 31.984 0 58.386 23.808 62.925 54.733A234.394 234.394 0 0 1 742.093 484.88v155.512l24.15 36.454a51.2 51.2 0 0 1-42.668 79.48H581.564zm-47.957-485.922c.069-.904.12-1.809.12-2.73 0-16.657-13.26-30.089-29.491-30.089-16.214 0-29.474 13.432-29.474 30.089 0 1.245.085 2.491.221 3.703l1.81 15.155-14.849 3.499a200.226 200.226 0 0 0-154.265 194.85v166.656l-29.457 44.1a17.067 17.067 0 0 0 14.182 26.556h431.155a17.067 17.067 0 0 0 14.234-26.487l-29.815-45.04V484.882A200.21 200.21 0 0 0 547.26 288.614l-14.985-2.986 1.331-15.224z" fill="#FFF"></path>
              <path d="M612.864 322.697c0 30.378 24.303 55.022 54.272 55.022 30.003 0 54.323-24.644 54.323-55.022 0-30.38-24.32-55.023-54.306-55.023s-54.306 24.644-54.306 55.023z" fill="#FA5252"></path>
            </svg> 温馨提示：
          </div> 
          <div class="content-tips">本文最后更新于<?php echo gmdate('Y年m月d日', $date); ?>，已超过<?php echo $years; ?>年<?php echo $months; ?>个月(约<?php echo floor((time() - ($date)) / 86400); ?>天)没有更新，若内容或图片失效，请<a href="<?php echo Url::log($logid); ?>#comments">留言</a>反馈。</div>
        </div>      
      </div>
    <?php } ?> 
    <?php endif;?>

这段代码的目的是检查文章的最后更新时间，如果时间超过了一年，那么它会显示一个提示，告诉访客这篇文章已经多久没有更新，并提供了一个留言反馈的链接。

上述代码函数假设每年有365天，每月有30天，这只是一个近似值。在实际应用中，由于闰年的存在以及不同月份天数的差异，这个计算可能不会完全准确。如果需要更精确的计算，可以使用DateTime和DateInterval类，来计算更精确的年数和月数差异，然后直接从DateInterval对象中获取年和月的数量。这种方法更加准确，因为它考虑了闰年和每个月的实际天数。 如下：

<?php if(_g('tips')==1): ?>
<?php  
$time = new DateTime('@' . $date); // 假设$date是一个UNIX时间戳  
$now = new DateTime();  
$interval = $now->diff($time);  

$years = $interval->y;  
$months = $interval->m;  

if ($years > 0 || $months > 0) {  
?>  
    <div class="article-statement">  
        <div class="article-time-tips">  
            <div class="content-tips">  
             <svg class="icon-tips" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="20" height="20">
              <path d="M0 512c0 282.778 229.222 512 512 512s512-229.222 512-512S794.778 0 512 0 0 229.222 0 512z" fill="#FF8C00" fill-opacity=".51"></path>
              <path d="M462.473 756.326a45.039 45.039 0 0 0 41.762 28.74 45.039 45.039 0 0 0 41.779-28.74h-83.541zm119.09 0c-7.73 35.909-39.372 62.874-77.311 62.874-37.957 0-69.598-26.965-77.33-62.874H292.404a51.2 51.2 0 0 1-42.564-79.65l23.723-35.498V484.88a234.394 234.394 0 0 1 167.492-224.614c3.635-31.95 30.498-56.815 63.18-56.815 31.984 0 58.386 23.808 62.925 54.733A234.394 234.394 0 0 1 742.093 484.88v155.512l24.15 36.454a51.2 51.2 0 0 1-42.668 79.48H581.564zm-47.957-485.922c.069-.904.12-1.809.12-2.73 0-16.657-13.26-30.089-29.491-30.089-16.214 0-29.474 13.432-29.474 30.089 0 1.245.085 2.491.221 3.703l1.81 15.155-14.849 3.499a200.226 200.226 0 0 0-154.265 194.85v166.656l-29.457 44.1a17.067 17.067 0 0 0 14.182 26.556h431.155a17.067 17.067 0 0 0 14.234-26.487l-29.815-45.04V484.882A200.21 200.21 0 0 0 547.26 288.614l-14.985-2.986 1.331-15.224z" fill="#FFF"></path>
              <path d="M612.864 322.697c0 30.378 24.303 55.022 54.272 55.022 30.003 0 54.323-24.644 54.323-55.022 0-30.38-24.32-55.023-54.306-55.023s-54.306 24.644-54.306 55.023z" fill="#FA5252"></path>
            </svg> 温馨提示：
          </div> 
          <div class="content-tips">本文最后更新于<?php echo gmdate('Y年m月d日', $date); ?>，已超过<?php echo $years; ?>年<?php echo $months; ?>个月(约<?php echo floor((time() - ($date)) / 86400); ?>天)没有更新，若内容或图片失效，请<a href="<?php echo Url::log($logid); ?>#comments">留言</a>反馈。  
            </div>  
        </div>  
    </div>  
<?php  
}  
?>
<?php endif;?>

创建了两个DateTime对象：一个表示文章的最后更新时间（$lastUpdatedDateTime），另一个表示当前时间（$currentDateTime）。然后，我们使用diff方法计算两个日期之间的差异，并将结果存储在$interval对象中。

$interval对象包含了年（y）、月（m）、日（d）等差异信息。直接从$interval对象中获取年数和月数，并在HTML中显示这些信息。

.article-statement {
    padding-top: 0px;
    padding-bottom: 0px;
    margin: 0px 0px 5px 0px;
}
.article-time-tips {
    background: #fffcef;
    border-radius: 4px;
    padding: 15px;
    color: #db7c22;
    border: 1px solid #ffbb76;
    -webkit-animation: overdue 1.5s ease-in-out;
    animation: overdue 1.5s ease-in-out
}
.article-time-tips .title-tips {
    display: flex;
    align-items: center;
    margin-bottom: 0px;
    margin-top: -5px;
    font-size: 15px;
    font-weight: 500;
}
.article-time-tips .title-tips .icon-tips {
    width: 20px;
    height: 20px;
    margin-right: 8px;
}
.article-time-tips .content-tips {
    padding-left: 28px;
    margin-bottom: -5px;
    text-align: justify;
}
@media (max-width: 1010px) {
    .article-time-tips {
        padding:10px;
    }
    .article-time-tips .title-tips {
        margin-bottom:0px;
        font-size:14px;
    }
    .article-time-tips .title-tips .icon-tips {
        margin-right:5px;
    }
    .article-time-tips .content-tips {
        font-size:13px;
        padding-left:0;
        margin: 0px;
        line-height: 16px;
    }
}
@-webkit-keyframes overdue {
    0% {
        -webkit-clip-path: circle(0 at 0 0);
        clip-path: circle(0 at 0 0)
    }
    100% {
        -webkit-clip-path: circle(100%);
        clip-path: circle(100%)
    }
}
@keyframes overdue {
    0% {
        -webkit-clip-path: circle(0 at 0 0);
        clip-path: circle(0 at 0 0)
    }
    100% {
        -webkit-clip-path: circle(100%);
        clip-path: circle(100%)
    }
}