Display variation value in variation dropdown (Woocommerce)

variation-price-label.php

<?php
/**
 * Plugin Name: WooCommerce - Display Variation Price in Dropdown
 * Plugin URI: https://ridwanarifandi.com
 * Description: Display price in variation dropdown
 * Version: 1.0.0
 * Author: Ridwan Arifandi
 * Author URI: https://ridwanarifandi
 * Text Domain: woocommerce
 *
 */

// Set global variable to store the price value

global $variation_prices;

$variation_prices = [];

/**
 * Check attribute price then store into global variable $variation_prices
 * Hooked via filter woocommerce_dropdown_variation_attribute_options_args
 * @param  array $args [description]
 * @return array       [description]
 */
function check_variation_dropdown_args($args)
{
    global $product,$variation_prices;

    $attribute  = $args['attribute'];
    $options    = $args['options'];
    $variations = $product->get_available_variations();

    foreach($variations as $var) :
        if(isset($var['attributes']['attribute_'.$attribute]) && in_array($var['attributes']['attribute_'.$attribute],$options)) :
            $size = ($var['attributes']['attribute_'.$attribute]);
            $variation_prices[$size] = strip_tags($var['price_html']);
        endif;
    endforeach;

    return $args;
}

add_filter('woocommerce_dropdown_variation_attribute_options_args','check_variation_dropdown_args');

/**
 * Display variation price if exits
 * @param  string $label [description]
 * @return string        [description]
 */
function display_price_in_variation_dropdown($label)
{
    global $product,$variation_prices;

    $slug = sanitize_title($label);

    if(isset($variation_prices[$slug])) :
        $label .= " (".$variation_prices[$slug].")";
    endif;

    return $label;
}

add_filter('woocommerce_variation_option_name','display_price_in_variation_dropdown');