How to Add Size Attribute In Configuration Product Create Programatically For Following Code?

<?php error_reporting(1); set_time_limit(0); ini_set(‘memory_limit’, ‘2048M’); use Magento\Framework\App\Bootstrap; /** * If your external file is in root folder */ require __DIR__ . ‘/app/bootstrap.php’; /** * If your external file is NOT in root folder * Let’s suppose, your file is inside a folder named ‘xyz’ * * And, let’s suppose, your root directory path is *…