// 取消搜索词大小写区分 function zib_custom_search_case_insensitive($where) { global $wpdb; // 针对 MySQL 数据库(将搜索词和字段都转为小写匹配) if (strpos($where, "{$wpdb->posts}.post_title LIKE") !== false) { $where = preg_replace( "/({$wpdb->posts}.post_title LIKE ')%'/", "LOWER({$wpdb->posts}.post_title) LIKE LOWER('$1%')", $where ); } if (strpos($where, "{$wpdb->posts}.post_content LIKE") !== false) { $where = preg_replace( "/({$wpdb->posts}.post_content LIKE ')%'/", "LOWER({$wpdb->posts}.post_content) LIKE LOWER('$1%')", $where ); } return $where; } add_filter('posts_where', 'zib_custom_search_case_insensitive');