Woocommerce Import - Dynamic Fetch images from static path

<?php 

function fab_woocommerce_product_importer_pre_expand_data($data)
{
	$ext = "jpg";
	$sku = $data['sku'];
	$url = "https://sample.com/images/";
	if (isset($data['images'])) {
		$images = $data['images'];

		foreach ($images as $index => $image) {
			if (isValidURL($image)) {
				$images[$index] = $image;
			} else {
				$images[$index] = $url . $image;
			}
		}
		$data['raw_image_id'] = array_shift($images);

		if (!empty($images)) {
			$data['raw_gallery_image_ids'] = $images;
		}

		unset($data['images']);
	} else {
		$data['raw_image_id'] = $url . $sku . '.' . $ext;
	}

	return $data;
}
add_action('woocommerce_product_importer_pre_expand_data', 'fab_woocommerce_product_importer_pre_expand_data', 10, 2);

function isValidURL($url)
{
	return preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*
        (:[0-9]+)?(/.*)?$|i', $url);
}