让 WordPress 只搜索文章的标题

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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 );