WordPress默认搜索结果是在文章全文匹配，包括文章内容、文章标题与文章标签，但凡文章中包含搜索关键词都会出现在搜索结果中，这样导致搜索出来的结果不够精确，要想提高搜索结果的精确度可以限制搜索关键词只在文章标题匹配，通过下面的代码可以实现。
实现代码：
把下面的代码添加到当前主题的functions.php文件：
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function __search_by_title_only($search, &$wp_query) { if (empty($search)) return $search; // skip processing - no search term in query $q = &$wp_query - >query_vars; // wp-includes/query.php line 2128 (version 3.1) $n = !empty($q['exact']) ? '': '%'; $searchand = ''; foreach((array) $q['search_terms'] as $term) { $term = esc_sql(like_escape($term)); $search. = "{$searchand}($wpdb->posts.post_title LIKE '{$n}{$term}{$n}')"; $searchand = ' AND '; } $term = esc_sql(like_escape($q['s'])); if (empty($q['sentence']) && count($q['search_terms']) > 1 && $q['search_terms'][0] != $q['s']) $search. = " OR ($wpdb->posts.post_title LIKE '{$n}{$term}{$n}')"; if (!empty($search)) { $search = " AND ({$search}) "; if (!is_user_logged_in()) $search. = " AND ($wpdb->posts.post_password = '') "; } return $search; } add_filter('posts_search', '__search_by_title_only', 10, 2); |
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