``` //seo 代码 function bigfa_description() { global $s, $post; $description = ''; $blog_name = get_bloginfo('name'); if ( is_singular() ) { $ID = $post-> ID; $title = $post-> post_title; $author = $post-> post_author; $user_info = get_userdata($author); $post_author = $user_info-> display_name; if (!get_post_meta($ID, "meta-description", true)) { $description = $title.' - 作者: '.$post_author.',首发于'.$blog_name; } else { $description = get_post_meta($ID, "meta-description", true); } } elseif ( is_home () ) { $description = "我是博客首页的描述,么么哒"; // 首页要自己加,如果你主题有后台设置可以连接上 } elseif ( is_tag() ) { $description = single_tag_title('', false) . " - ". trim(strip_tags(tag_description())); } elseif ( is_category() ) { $description = single_cat_title('', false) . " - ". trim(strip_tags(category_description())); } elseif ( is_archive() ) { $description = $blog_name . "'" . trim( wp_title('', false) ) . "'"; } elseif ( is_search() ) { $description = $blog_name . ": '" . esc_html( $s, 1 ) . "' 的搜索結果"; } else { $description = $blog_name . "'" . trim( wp_title('', false) ) . "'"; } $description = mb_substr( $description, 0, 220, 'utf-8' ); echo "<meta name="description" content="$description">n"; } add_action('wp_head','bigfa_description'); ```