63 lines
2.2 KiB
PHP
63 lines
2.2 KiB
PHP
<?php
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function generate_toc($content) {
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$toc = '<aside class="sidebar right-sidebar sticky">
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<section class="widget archives">
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<div class="widget-icon">
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<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-hash" width="24" height="24" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
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<path stroke="none" d="M0 0h24v24H0z"/>
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<line x1="5" y1="9" x2="19" y2="9" />
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<line x1="5" y1="15" x2="19" y2="15" />
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<line x1="11" y1="4" x2="7" y2="20" />
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<line x1="17" y1="4" x2="13" y2="20" />
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</svg>
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</div>
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<h2 class="widget-title section-title">文章目录</h2>
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<div class="widget--toc">
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<nav id="TableOfContents">
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';
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// 初始化变量
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$has_toc = false;
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// 使用正则表达式提取标题
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if (preg_match_all('/<h([1-6])>(.*?)<\/h\1>/', $content, $matches, PREG_SET_ORDER)) {
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$current_level = 0;
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foreach ($matches as $match) {
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$level = intval($match[1]);
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$title = strip_tags($match[2]);
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$id = $title; // 保留标题原有格式
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// 根据标题层级生成嵌套列表
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if ($level > $current_level) {
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$toc .= '<ol>';
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} elseif ($level < $current_level) {
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$toc .= str_repeat('</ol>', $current_level - $level);
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}
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$toc .= '<li><a href="#' . htmlspecialchars($id) . '">' . htmlspecialchars($title) . '</a>';
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// 检查下一个标题是否是下一级，如果是则在这里闭合 li，以便包含子 ol
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if ($level >= $current_level) {
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$toc .= '</li>';
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}
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$current_level = $level;
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$has_toc = true;
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}
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// 关闭所有打开的列表标签
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if ($current_level > 0) {
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$toc .= str_repeat('</ol>', $current_level);
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}
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}
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$toc .= '
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</nav>
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</div>
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</section>
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</aside>';
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// 如果没有 TOC 内容，则返回空字符串
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return $has_toc ? $toc : '';
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}
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?>
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