<form method="POST">
    <h3>Editing: Order.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
namespace Automattic\WooCommerce\StoreApi\Routes\V1;

use Automattic\WooCommerce\StoreApi\SchemaController;
use Automattic\WooCommerce\StoreApi\Schemas\v1\AbstractSchema;
use Automattic\WooCommerce\StoreApi\Utilities\OrderController;
use Automattic\WooCommerce\StoreApi\Exceptions\RouteException;
use Automattic\WooCommerce\StoreApi\Utilities\OrderAuthorizationTrait;

/**
 * Order class.
 */
class Order extends AbstractRoute {
	use OrderAuthorizationTrait;

	/**
	 * The route identifier.
	 *
	 * @var string
	 */
	const IDENTIFIER = 'order';

	/**
	 * The schema item identifier.
	 *
	 * @var string
	 */
	const SCHEMA_TYPE = 'order';

	/**
	 * Order controller class instance.
	 *
	 * @var OrderController
	 */
	protected $order_controller;

	/**
	 * Constructor.
	 *
	 * @param SchemaController $schema_controller Schema Controller instance.
	 * @param AbstractSchema   $schema Schema class for this route.
	 */
	public function __construct( SchemaController $schema_controller, AbstractSchema $schema ) {
		parent::__construct( $schema_controller, $schema );
		$this-&gt;order_controller = new OrderController();
	}

	/**
	 * Get the path of this REST route.
	 *
	 * @return string
	 */
	public function get_path() {
		return self::get_path_regex();
	}

	/**
	 * Get the path of this rest route.
	 *
	 * @return string
	 */
	public static function get_path_regex() {
		return '/order/(?P&lt;id&gt;[\d]+)';
	}

	/**
	 * Get method arguments for this REST route.
	 *
	 * @return array An array of endpoints.
	 */
	public function get_args() {
		return [
			[
				'methods'             =&gt; \WP_REST_Server::READABLE,
				'callback'            =&gt; [ $this, 'get_response' ],
				'permission_callback' =&gt; [ $this, 'is_authorized' ],
				'args'                =&gt; [
					'context' =&gt; $this-&gt;get_context_param( [ 'default' =&gt; 'view' ] ),
				],
			],
			'schema' =&gt; [ $this-&gt;schema, 'get_public_item_schema' ],
		];
	}

	/**
	 * Handle the request and return a valid response for this endpoint.
	 *
	 * @param \WP_REST_Request $request Request object.
	 * @return \WP_REST_Response
	 */
	protected function get_route_response( \WP_REST_Request $request ) {
		$order_id = absint( $request['id'] );
		return rest_ensure_response( $this-&gt;schema-&gt;get_item_response( wc_get_order( $order_id ) ) );
	}
}
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