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wordpress的模糊搜索范围改成仅搜索标题

在网站运营中难免会使用到WordPress的搜索功能，WordPress主题自带的默认搜索功能，是使用模糊搜索，包括文章内容、文章标题与文章标签，在用WordPress建站后，随着文章逐渐增多，默认的搜索功能并不优秀，这样会使得搜索结果不精确，还大大增加了搜索时长，如果你想让它搜索出来的结果更精确、相关，我们今天就来教给大家只搜索wordpress搜索标题。

function hx_search_by_title_only( $search, &$wp_query )
{
    global $wpdb;if ( empty( $search ) )
    return $search;
    $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', 'hx_search_by_title_only', 500, 2 );

另外一种方案，同样是放到主题文件夹functions.php中

add_filter( 'posts_search', 'dw_search_by_title', 10, 2 );
function dw_search_by_title( $search, $wp_query ) {
    if ( ! empty( $search ) && ! empty( $wp_query->query_vars['search_terms'] ) ) {
        global $wpdb;
        $q = $wp_query->query_vars;
        $n = ! empty( $q['exact'] ) ? '' : '%';
        $search = array();
        foreach ( ( array ) $q['search_terms'] as $term )
            $search[] = $wpdb->prepare( "$wpdb->posts.post_title LIKE %s", $n . $wpdb->esc_like( $term ) . $n );
        if ( ! is_user_logged_in() )
            $search[] = "$wpdb->posts.post_password = ''";
        $search = ' AND ' . implode( ' AND ', $search );
    }
    return $search;
}