I started with a fresh template and added a Post Type according to specification at GenerateWP.

I then added a taxonomy to the custom post type, also according to the above-referenced website:

// Register Custom Taxonomy
function addIssuesTaxonomy() {

    $labels = array(
        'name'                       => _x( 'Issues', 'Taxonomy General Name', 'text_domain' ),
        'singular_name'              => _x( 'Issue', 'Taxonomy Singular Name', 'text_domain' ),
        'menu_name'                  => __( 'Issues', 'text_domain' ),
        'all_items'                  => __( 'All Issues', 'text_domain' ),
        'parent_item'                => __( 'Parent Issue', 'text_domain' ),
        'parent_item_colon'          => __( 'Parent Issue:', 'text_domain' ),
        'new_item_name'              => __( 'New Issue Name', 'text_domain' ),
        'add_new_item'               => __( 'Add New Issue', 'text_domain' ),
        'edit_item'                  => __( 'Edit Issue', 'text_domain' ),
        'update_item'                => __( 'Update Issue', 'text_domain' ),
        'view_item'                  => __( 'View Issue', 'text_domain' ),
        'separate_items_with_commas' => __( 'Separate issues with commas', 'text_domain' ),
        'add_or_remove_items'        => __( 'Add or remove issues', 'text_domain' ),
        'choose_from_most_used'      => __( 'Choose from the most used', 'text_domain' ),
        'popular_items'              => __( 'Popular Issues', 'text_domain' ),
        'search_items'               => __( 'Search Issues', 'text_domain' ),
        'not_found'                  => __( 'Not Found', 'text_domain' ),
        'no_terms'                   => __( 'No items', 'text_domain' ),
        'items_list'                 => __( 'Issues list', 'text_domain' ),
        'items_list_navigation'      => __( 'Issues list navigation', 'text_domain' ),
    );
    $rewrite = array(
        'slug'                       => 'issues',
        'with_front'                 => true,
        'hierarchical'               => false,
    );
    $args = array(
        'labels'                     => $labels,
        'hierarchical'               => true,
        'public'                     => true,
        'show_ui'                    => true,
        'show_admin_column'          => true,
        'show_in_nav_menus'          => true,
        'show_tagcloud'              => true,
        'rewrite'                    => $rewrite,
    );
    register_taxonomy( 'issues', array( 'articles' ), $args );

}
add_action( 'init', 'addIssuesTaxonomy', 0 );

I then saved the permalinks in this structure http://xxx/sample-post/, but no matter what, the newly added taxonomy does not show up at http://xxx/issues. Instead I get a 404. Navigating to /articles/issues/ also results in 404.

What am I missing in order to display all issues found in the newly created taxonomy?

I started with a fresh template and added a Post Type according to specification at GenerateWP.

I then added a taxonomy to the custom post type, also according to the above-referenced website:

// Register Custom Taxonomy
function addIssuesTaxonomy() {

    $labels = array(
        'name'                       => _x( 'Issues', 'Taxonomy General Name', 'text_domain' ),
        'singular_name'              => _x( 'Issue', 'Taxonomy Singular Name', 'text_domain' ),
        'menu_name'                  => __( 'Issues', 'text_domain' ),
        'all_items'                  => __( 'All Issues', 'text_domain' ),
        'parent_item'                => __( 'Parent Issue', 'text_domain' ),
        'parent_item_colon'          => __( 'Parent Issue:', 'text_domain' ),
        'new_item_name'              => __( 'New Issue Name', 'text_domain' ),
        'add_new_item'               => __( 'Add New Issue', 'text_domain' ),
        'edit_item'                  => __( 'Edit Issue', 'text_domain' ),
        'update_item'                => __( 'Update Issue', 'text_domain' ),
        'view_item'                  => __( 'View Issue', 'text_domain' ),
        'separate_items_with_commas' => __( 'Separate issues with commas', 'text_domain' ),
        'add_or_remove_items'        => __( 'Add or remove issues', 'text_domain' ),
        'choose_from_most_used'      => __( 'Choose from the most used', 'text_domain' ),
        'popular_items'              => __( 'Popular Issues', 'text_domain' ),
        'search_items'               => __( 'Search Issues', 'text_domain' ),
        'not_found'                  => __( 'Not Found', 'text_domain' ),
        'no_terms'                   => __( 'No items', 'text_domain' ),
        'items_list'                 => __( 'Issues list', 'text_domain' ),
        'items_list_navigation'      => __( 'Issues list navigation', 'text_domain' ),
    );
    $rewrite = array(
        'slug'                       => 'issues',
        'with_front'                 => true,
        'hierarchical'               => false,
    );
    $args = array(
        'labels'                     => $labels,
        'hierarchical'               => true,
        'public'                     => true,
        'show_ui'                    => true,
        'show_admin_column'          => true,
        'show_in_nav_menus'          => true,
        'show_tagcloud'              => true,
        'rewrite'                    => $rewrite,
    );
    register_taxonomy( 'issues', array( 'articles' ), $args );

}
add_action( 'init', 'addIssuesTaxonomy', 0 );

I then saved the permalinks in this structure http://xxx/sample-post/, but no matter what, the newly added taxonomy does not show up at http://xxx/issues. Instead I get a 404. Navigating to /articles/issues/ also results in 404.

What am I missing in order to display all issues found in the newly created taxonomy?

• custom-post-types
• php
• taxonomy

1 Answer 1

There's no such page in WordPress. /issues/ doesn't exist. All WordPress URLs display either a single post/page, or a list of posts/pages (search, date archives, category archives etc.). So there's no way WordPress will list terms. If you create a new issue, then that will be accessible at /issues/issue-name/, but nothing will exist on /issues/ by itself.

If you want to list all issues, then the simplest method would be to create a page called Issues, then create a custom page template that lists all terms in the Issues taxonomy. You can do this with get_terms():

$issues = get_terms( [ 'taxonomy' => 'issues' ] );

if ( ! is_wp_error( $issues ) && $issues ) {
    foreach( $issues as $issue ) {
        echo $issue->name; // Name of issue.
        echo get_term_link( $issue ); // URL to articles in that issue.
    }
}