public static function save_variations( $post_id, $post ) {
		// phpcs:disable WordPress.Security.NonceVerification.Missing
		if ( isset( $_POST['variable_post_id'] ) ) {
			$parent = wc_get_product( $post_id );
			$parent->set_default_attributes( self::prepare_set_attributes( $parent->get_attributes(), 'default_attribute_' ) );
			$parent->save();

			$max_loop   = max( array_keys( wp_unslash( $_POST['variable_post_id'] ) ) ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
			$data_store = $parent->get_data_store();
			$data_store->sort_all_product_variations( $parent->get_id() );

			for ( $i = 0; $i <= $max_loop; $i++ ) {

				if ( ! isset( $_POST['variable_post_id'][ $i ] ) ) {
					continue;
				}
				$variation_id = absint( $_POST['variable_post_id'][ $i ] );
				$variation    = wc_get_product_object( 'variation', $variation_id );
				$stock        = null;

				// Handle stock changes.
				if ( isset( $_POST['variable_stock'], $_POST['variable_stock'][ $i ] ) ) {
					if ( isset( $_POST['variable_original_stock'], $_POST['variable_original_stock'][ $i ] ) && wc_stock_amount( $variation->get_stock_quantity( 'edit' ) ) !== wc_stock_amount( wp_unslash( $_POST['variable_original_stock'][ $i ] ) ) ) {
						/* translators: 1: product ID 2: quantity in stock */
						WC_Admin_Meta_Boxes::add_error( sprintf( __( 'The stock has not been updated because the value has changed since editing. Product %1$d has %2$d units in stock.', 'woocommerce' ), $variation->get_id(), $variation->get_stock_quantity( 'edit' ) ) );
					} else {
						$stock = wc_stock_amount( wp_unslash( $_POST['variable_stock'][ $i ] ) );
					}
				}

				// Handle dates.
				$date_on_sale_from = '';
				$date_on_sale_to   = '';

				// Force date from to beginning of day.
				if ( isset( $_POST['variable_sale_price_dates_from'][ $i ] ) ) {
					$date_on_sale_from = wc_clean( wp_unslash( $_POST['variable_sale_price_dates_from'][ $i ] ) );

					if ( ! empty( $date_on_sale_from ) ) {
						$date_on_sale_from = date( 'Y-m-d 00:00:00', strtotime( $date_on_sale_from ) );
					}
				}

				// Force date to to the end of the day.
				if ( isset( $_POST['variable_sale_price_dates_to'][ $i ] ) ) {
					$date_on_sale_to = wc_clean( wp_unslash( $_POST['variable_sale_price_dates_to'][ $i ] ) );

					if ( ! empty( $date_on_sale_to ) ) {
						$date_on_sale_to = date( 'Y-m-d 23:59:59', strtotime( $date_on_sale_to ) );
					}
				}

				$errors = $variation->set_props(
					array(
						'status'            => isset( $_POST['variable_enabled'][ $i ] ) ? 'publish' : 'private',
						'menu_order'        => isset( $_POST['variation_menu_order'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variation_menu_order'][ $i ] ) ) : null,
						'regular_price'     => isset( $_POST['variable_regular_price'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_regular_price'][ $i ] ) ) : null,
						'sale_price'        => isset( $_POST['variable_sale_price'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_sale_price'][ $i ] ) ) : null,
						'virtual'           => isset( $_POST['variable_is_virtual'][ $i ] ),
						'downloadable'      => isset( $_POST['variable_is_downloadable'][ $i ] ),
						'date_on_sale_from' => $date_on_sale_from,
						'date_on_sale_to'   => $date_on_sale_to,
						'description'       => isset( $_POST['variable_description'][ $i ] ) ? wp_kses_post( wp_unslash( $_POST['variable_description'][ $i ] ) ) : null,
						'download_limit'    => isset( $_POST['variable_download_limit'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_download_limit'][ $i ] ) ) : null,
						'download_expiry'   => isset( $_POST['variable_download_expiry'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_download_expiry'][ $i ] ) ) : null,
						// Those are sanitized inside prepare_downloads.
						'downloads'         => self::prepare_downloads(
							isset( $_POST['_wc_variation_file_names'][ $variation_id ] ) ? wp_unslash( $_POST['_wc_variation_file_names'][ $variation_id ] ) : array(), // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
							isset( $_POST['_wc_variation_file_urls'][ $variation_id ] ) ? wp_unslash( $_POST['_wc_variation_file_urls'][ $variation_id ] ) : array(), // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
							isset( $_POST['_wc_variation_file_hashes'][ $variation_id ] ) ? wp_unslash( $_POST['_wc_variation_file_hashes'][ $variation_id ] ) : array() // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
						),
						'manage_stock'      => isset( $_POST['variable_manage_stock'][ $i ] ),
						'stock_quantity'    => $stock,
						'backorders'        => isset( $_POST['variable_backorders'], $_POST['variable_backorders'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_backorders'][ $i ] ) ) : null,
						'stock_status'      => isset( $_POST['variable_stock_status'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_stock_status'][ $i ] ) ) : null,
						'image_id'          => isset( $_POST['upload_image_id'][ $i ] ) ? wc_clean( wp_unslash( $_POST['upload_image_id'][ $i ] ) ) : null,
						'attributes'        => self::prepare_set_attributes( $parent->get_attributes(), 'attribute_', $i ),
						'sku'               => isset( $_POST['variable_sku'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_sku'][ $i ] ) ) : '',
						'weight'            => isset( $_POST['variable_weight'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_weight'][ $i ] ) ) : '',
						'length'            => isset( $_POST['variable_length'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_length'][ $i ] ) ) : '',
						'width'             => isset( $_POST['variable_width'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_width'][ $i ] ) ) : '',
						'height'            => isset( $_POST['variable_height'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_height'][ $i ] ) ) : '',
						'shipping_class_id' => isset( $_POST['variable_shipping_class'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_shipping_class'][ $i ] ) ) : null,
						'tax_class'         => isset( $_POST['variable_tax_class'][ $i ] ) ? wc_clean( wp_unslash( $_POST['variable_tax_class'][ $i ] ) ) : null,
					)
				);

				if ( is_wp_error( $errors ) ) {
					WC_Admin_Meta_Boxes::add_error( $errors->get_error_message() );
				}

				/**
				 * Set variation props before save.
				 *
				 * @param object $variation WC_Product_Variation object.
				 * @param int $i
				 * @since 3.8.0
				 */
				do_action( 'woocommerce_admin_process_variation_object', $variation, $i );

				$variation->save();

				do_action( 'woocommerce_save_product_variation', $variation_id, $i );
			}
		}
		// phpcs:enable WordPress.Security.NonceVerification.Missing
	}