\s*/m', // 引用 '/^[\-\*\+]\s+/m', // 列表 '/^\d+\.\s+/m', // 有序列表 '/^[\-\*_]{3,}\s*$/m', // 分割线 ]; $content = preg_replace($patterns, '', $content); // 处理链接 [text](url) -> text $content = preg_replace('/\[([^\]]+)\]\([^\)]+\)/', '$1', $content); // 处理强调 **text**, __text__, *text*, _text_, ~~text~~ $content = preg_replace('/([*_~]{1,2})([^*_~]+)\1/', '$2', $content); $content = preg_replace('/\s+/', ' ', $content); return trim($content); } function Mirai_subContent($content, $length = 200, $stripTags = true) { if ($stripTags) { $content = strip_tags($content); } $content = preg_replace('/\s+/', ' ', $content); $content = trim($content); if (mb_strlen($content, 'UTF-8') <= $length) { return $content; } return mb_substr($content, 0, $length, 'UTF-8') . '...'; } function Mirai_addNofollowToExternalLinks($content) { return preg_replace_callback('/]*?)href\s*=\s*(?|"([^"]+)"|\'([^\']+)\'|([^\s>]+))([^>]*?)>/i', function($matches) { $before_href = $matches[1]; $href = $matches[2]; $after_href = $matches[3]; // 使用统一的内部链接检测函数 $is_internal = Mirai_isInternalUrl($href); if (!$is_internal) { $rel_added = false; $new_rel = 'noopener nofollow'; if (preg_match('/rel=["\'](.*?)["\']/i', $before_href, $m)) { $rel_val = $m[1]; if (stripos($rel_val, 'noopener') === false) $rel_val .= ' noopener'; if (stripos($rel_val, 'nofollow') === false) $rel_val .= ' nofollow'; $before_href = str_replace($m[0], 'rel="' . trim($rel_val) . '"', $before_href); $rel_added = true; } if (!$rel_added && preg_match('/rel=["\'](.*?)["\']/i', $after_href, $m)) { $rel_val = $m[1]; if (stripos($rel_val, 'noopener') === false) $rel_val .= ' noopener'; if (stripos($rel_val, 'nofollow') === false) $rel_val .= ' nofollow'; $after_href = str_replace($m[0], 'rel="' . trim($rel_val) . '"', $after_href); $rel_added = true; } if (!$rel_added) { $after_href = ' rel="' . $new_rel . '"' . $after_href; } } return ''; }, $content); } function Mirai_handleRssFeed($type) { $options = Mirai_opt(); $rssEnabled = Mirai_featureEnabled('seo') && (!isset($options->rssEnable) || $options->rssEnable === '1'); if (!$rssEnabled) { throw new Exception('RSS订阅已禁用'); } require_once dirname(__DIR__) . '/modules/rss.php'; $rss = new Mirai_Rss(); if ($type === 'feed') { $rss->renderRss2(); } else { $rss->renderAtom(); } exit; }