Updated CPT & Taxonomies Hook

functions.php

<?php

/* Register Custom Post Types */
function cwptheme_post_type() {
    $post_types_arr = array( 'Amenities', 'Principles', 'Investments' );

    foreach( $post_types_arr as $post_type_a){
        
        $labels = array(
            'name'                => __( $post_type_a ),
            'singular_name'       => __( $post_type_a),
            'menu_name'           => __( $post_type_a),
            'parent_item_colon'   => __( 'Parent '.$post_type_a),
            'all_items'           => __( 'All '.$post_type_a),
            'view_item'           => __( 'View '.$post_type_a),
            'add_new_item'        => __( 'Add New '.$post_type_a),
            'add_new'             => __( 'Add New'),
            'edit_item'           => __( 'Edit '.$post_type_a),
            'update_item'         => __( 'Update '.$post_type_a),
            'search_items'        => __( 'Search '.$post_type_a),
            'not_found'           => __( 'Not Found'),
            'not_found_in_trash'  => __( 'Not found in Trash')
        );

        $args = array(
            'label'               => __( $post_type_a),
            'description'         => __( 'Add '.$post_type_a),
            'labels'              => $labels,
            'supports'            => array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'revisions', 'custom-fields', 'page-attributes'),
            'public'              => true,
            'hierarchical'        => false, // Changed to false for better post-like behavior
            'show_ui'             => true,
            'show_in_menu'        => true,
            'show_in_nav_menus'   => true,
            'show_in_admin_bar'   => true,
            'has_archive'         => true,
            'can_export'          => true,
            'exclude_from_search' => false,
            'publicly_queryable'  => true,
            'capability_type'     => 'post', // Changed to 'post' instead of 'page'
            'show_in_rest'        => true,  // Added for Gutenberg support
        );

        register_post_type( $post_type_a, $args );
    }
}
add_action( 'init', 'cwptheme_post_type', 0 );

/* Register Custom Taxonomy */
function register_custom_taxonomies() {
    taxoFunc('Principles Categories', 'principles');
}
add_action('init', 'register_custom_taxonomies');

function taxoFunc($taxoName, $postType){
    $menuName = ucwords($taxoName);
    $taxoName = strtolower(str_replace( ' ', '_', $taxoName));

    $labels = array(
        'name'              => _x( $menuName, 'taxonomy general name' ),
        'singular_name'     => _x( $menuName, 'taxonomy singular name' ),
        'search_items'      => __( 'Search' ),
        'all_items'         => __( 'All' ),
        'parent_item'       => __( 'Parent' ),
        'parent_item_colon' => __( 'Parent:' ),
        'edit_item'         => __( 'Edit' ),
        'update_item'       => __( 'Update' ),
        'add_new_item'      => __( 'Add New' ),
        'new_item_name'     => __( 'New Name' ),
        'menu_name'         => __( $menuName ),
    );

    $args = array(
        'hierarchical'      => true,
        'labels'            => $labels,  
        'show_ui'           => true,
        'show_admin_column' => true,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => $taxoName, 'with_front' => false ),
        'show_in_rest'      => true, // Added for Gutenberg support
    );

    register_taxonomy( $taxoName, $postType, $args );
}