Register custompost type and taxonomy from plugin

balihomes-toolbox.php

<?php
/*
  Plugin Name:Bali Homes Toolbox
  Description:This plugin is for Bali Homes theme.
  Author: Logic Fighters
  Version: 1.0
*/
if ( ! class_exists( 'bh_custom_post_types' ) ):

function bh_custom_post_types() {
     
    register_post_type( 'villa',
        array(
            'labels' => array(
                'name' =>  'Villas' ,
                'singular_name' =>  'Villa',
                'add_new' => 'Add new Villa',
                'add_new_item' => 'Add new Villa',
            ),
            'public' => true,
            'menu_icon'=>'dashicons-images-alt2',
            'supports' => array( 'title','editor','thumbnail','excerpt','custom-fields'),
        )
    );  

}
    add_action( 'init', 'bh_custom_post_types' );
endif;
 


if(!function_exists('bh_register_location_taxonomy')):
function bh_register_location_taxonomy(){
	register_taxonomy(
        'villa_loc',  //The name of the taxonomy. Name should be in slug form (must not contain capital letters or spaces).
        'villa',                  //post type name
        array(
            'hierarchical' => true,
            'label' => 'Villa Location',  //Display name
            'labels' => array(
            'singular_name' => 'Villa Location',   
            'all_items' => 'All Locations',   
            'edit_item' => 'Edit Location',   
            'view_item' => 'View Location',   
            'update_item' => 'Update Location',   
            'add_new_item' => 'Add New Location',   
            'new_item_name' => 'New Location Name',     
    
            ),  
            'query_var' => true,
            'show_admin_column' => true,
            'rewrite'=> array(
                'slug' => 'villa-location', // This controls the base slug that will display before each term
                'with_front' => true // Don't display the category base before
            )
        )
    );
}
add_action( 'init', 'bh_register_location_taxonomy');
endif;

add_action( 'init', 'bh_register_taxonomy_for_object_type' );
function bh_register_taxonomy_for_object_type() {
    register_taxonomy_for_object_type( 'post_tag', 'villa' );
};