让 WordPress 只搜索文章的标题

WordPress 默认的搜索功能还真挺弱的，搜索出来的结果很不符合人意，如果你想让它检索出来的结果更加相关，可以限定只搜索文章的标题，将下面的代码添加到主题的 functions.php 文件即可：

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/**
 * 让 WordPress 只搜索文章的标题
 * https://www.wpdaxue.com/search-by-title-only.html
 */function __search_by_title_only( $search, &$wp_query ){global $wpdb; 	if ( empty( $search ) )return $search; // skip processing - no search term in query $q = $wp_query->query_vars;    $n = ! empty( $q['exact'] ) ? '' : '%'; $search =$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 ';} 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', 500, 2 );

/** * 让 WordPress 只搜索文章的标题 * https://www.wpdaxue.com/search-by-title-only.html */ function __search_by_title_only( $search, &$wp_query ) { global $wpdb; if ( empty( $search ) ) return $search; // skip processing - no search term in query $q = $wp_query->query_vars; $n = ! empty( $q['exact'] ) ? '' : '%'; $search = $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 '; } 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', 500, 2 );

参考资料：http://wordpress.stackexchange.com/questions/11822/