我试图显示分类描述，该描述基于页面设置为显示的分类（使用变量设置）

实际上，无论设置了哪个类别变量，我只看到了第一个描述。

我是这样设置的：

我构建了一个名为“product”的自定义帖子类型，并建立了一个名为“product\\u type”的分类法。

    //Register product post type
    add_action(\'init\', \'product_register\');
    function product_register() {
        $labels = array(
            \'name\' => (\'Products\'),
            \'singular_name\' => (\'Product\'),
            \'add_new\' => (\'Add New\'),
            \'add_new_item\' => (\'Add New Product\'),
            \'edit_item\' => (\'Edit Product\'),
            \'new_item\' => (\'New Product\'),
            \'view_item\' => (\'View Product\'),
            \'search_items\' => (\'Search\'),
            \'not_found\' => (\'Nothing found\'),
            \'not_found_in_trash\' => (\'Nothing found in Trash\'),
            \'parent_item_colon\' => \'\'
            );
        $args = array(
            \'labels\' => $labels,
            \'menu_icon\' => \'dashicons-tag\',
            \'public\' => true,
            \'has_archive\' => true,
            \'supports\' => array(\'title\', \'revisions\', \'editor\',\'thumbnail\'),
            \'capability_type\' => \'post\',
            \'rewrite\' => array("slug" => "product"), // Permalinks format
            );
        register_taxonomy(\'product_type\', array(\'product\'), array(
            \'hierarchical\' => true,
            \'label\' => \'Product Type\',
            \'singular_label\' => \'Type\',
            \'show_ui\' => true,
            \'show_admin_column\' => true,
            \'query_var\' => true,
            \'rewrite\' => true)
        );
        register_post_type( \'product\' , $args );
    }

在wordpress后端，我加载了一些术语并添加了描述。

归档产品。php的工作方式类似于登录页，但将接受来自名为$type的变量的信息来过滤内容。

    if (isset($_GET[\'type\']) || !empty($_GET[\'type\']) ) {
        $filtered = true;
        $type = $_GET[\'type\'];
    }

有了这些信息，我可以为包含该分类术语的项目设置WP\\u查询。

    if ($filtered == true) {
        $type = explode(\' \', $_GET[\'type\']);
        $taxonomy = array(
            array(
                \'taxonomy\' => \'product_type\',
                \'field\'    => \'slug\',
                \'terms\'    => $type
                )
            );
    $args = array(
        \'post_type\' => \'product\',
        \'posts_per_page\' => -1,
        \'order\' => \'DEC\',
        \'orderby\' => \'title\',
        \'offset\' => \'0\',
        \'tax_query\' => $taxonomy
        );
    $the_query = new WP_Query($args);
    if($the_query->have_posts()):
        $terms = get_the_terms( $post->ID, \'product_type\' );
    if($terms) {
        foreach( $terms as $term ) {
    echo $term->description; //always shows first term description, but should display description based on $type
    }
    }
    while($the_query->have_posts()):$the_query->the_post();
    the_title();
    the_content();
    endwhile;
    else: //nothing to show here
    endif;} else {
    // non-filtered page design
    }

该查询工作得很好，但正如我前面提到的，它只提取第一个分类描述。

这是要处理的部分：

    $terms = get_the_terms( $post->ID, \'product_type\' );
    if($terms) {
        foreach( $terms as $term ) {
    echo $term->description;
    }
    }

我猜它需要在查询中才能得到正确的描述，但这似乎没有什么区别。

我也尝试过：

    $term = get_term_by( $post->ID, $type, \'product_type\' );
    echo $term->description;

但这不会返回任何结果。

我没有主意了。我没有通过谷歌或搜索这个网站找到任何东西。

如有任何建议，敬请谅解。

$filtered = filter_input( INPUT_GET, \'type\', FILTER_SANITIZE_STRING )

$filtered = filter_input( INPUT_GET, \'type\', FILTER_SANITIZE_STRING );
if ( $filtered  ) {
    /**
     * I don\'t know if you will be passing more than one term. From your code it seems so
     */
    $types = explode( \' \', $filtered ); 
    foreach ( $types as $type ) {

        /**
         * Get the term object. 
         *
         * I have used the slug here as it seems that you are passing the slug. Adjust as necessary
         *
         * @see get_term_by()
         */
        $term = get_term_by( \'slug\', $type, \'product_type\' );
        // Make sure that $term has a valid value before outputting anything
        if ( !empty( $term ) || !is_wp_error( $term ) )
            echo $term->description; // Show term description
    }
    /* Replace code above with the following if you are passing just one term
    $term = get_term_by( \'slug\', $filtered, \'product_type\' ); 
    if ( !empty( $term ) || !is_wp_error( $term ) )
        echo $term->description; // Show term description
    */
    if ( have_posts() ) {
        while( have_posts() ) {
            the_post();

            the_title();
            the_content();
        }
    }

} else {

    // non-filtered page design
    // I don\'t know what will be displayed here, so I\'m keeping the loop and this separate

}

add_action( \'pre_get_posts\', function ( $q ) 
{
    $filtered = filter_input( INPUT_GET, \'type\', FILTER_SANITIZE_STRING );
    if (    !is_admin() // Only target the front end
         && $q->is_main_query() // Only target the main query
         && $q->is_post_type_archive( \'product\' ) // Only target product archive page
         && $filtered // If we have a $_GET[\'type\'] variable
    ) {
        if ( isset( $q->get( \'tax_query\' ) ) ) //Get current tax query
            $tax_query = []; // Set current tax_query to an empty array

        // Set our new tax_query
        $tax_query = [
            [
                \'taxonomy\'         => \'product_type\',
                \'field\'            => \'slug\'
                \'terms\'            => explode( \' \', $filtered ),
                \'include_children\' => false
            ]
        ];
        $q->set( \'tax_query\', $tax_query ); // Set new tax_query
        $q->set( \'posts_per_page\', -1 ); // Get all posts
        $q->set( \'order\', \'DESC\' ); // Descending sort order
        $q->set( \'orderby\', \'title\' ); // Sort by title
    }
});