Clients Post Type for Logo Walls

// Names used in labels and URLs: edit to suit.
$wpide_type = array(
    'name'     => 'client', // Internal name: lowercase, max 20 characters, never change it once you have content.
    'singular' => 'Client',
    'plural'   => 'Clients',
    'slug'     => 'clients',
);

add_action( 'init', function () use ( $wpide_type ) {
    $s = $wpide_type['singular'];
    $p = $wpide_type['plural'];

    register_post_type( $wpide_type['name'], array(
        'labels'        => array(
            'name'                  => $p,
            'singular_name'         => $s,
            'menu_name'             => $p,
            'add_new_item'          => "Add New $s",
            'edit_item'             => "Edit $s",
            'new_item'              => "New $s",
            'view_item'             => "View $s",
            'view_items'            => "View $p",
            'all_items'             => "All $p",
            'search_items'          => "Search $p",
            'not_found'             => 'Nothing found.',
            'not_found_in_trash'    => 'Nothing found in Trash.',
            'archives'              => "$s Archives",
            'attributes'            => "$s Attributes",
            'insert_into_item'      => "Insert into $s",
            'uploaded_to_this_item' => "Uploaded to this $s",
            'item_published'        => "$s published.",
            'item_updated'          => "$s updated.",
        ),
        'public'              => false,
        'show_ui'             => true,
        'show_in_nav_menus'   => false,
        'exclude_from_search' => true,
        'publicly_queryable'  => false,
        'has_archive'         => false,
        'rewrite'             => false,
        'show_in_rest'  => true,
        'menu_icon'     => 'dashicons-building',
        'menu_position' => 42,
        'supports'      => array( 'title', 'thumbnail', 'page-attributes', 'custom-fields' ),
    ) );
} );