Automattic / jetpack

					Jetpack::log( 'subsiteregister' );

					// If !$_GET['site_id'] stop registration and error.

					if ( ! isset( $_GET['site_id'] ) || empty( $_GET['site_id'] ) ) {

						/**

						 * Log error to state cookie for display later.

						 *

						 * @todo Make state messages show on Jetpack NA pages

						 */

						Jetpack::state( 'missing_site_id', esc_html__( 'Site ID must be provided to register a sub-site.', 'jetpack' ) );

						break;

					}

					// Send data to register endpoint and retrieve shadow blog details.

				case 'subsitedisconnect':

					Jetpack::log( 'subsitedisconnect' );

					if ( ! isset( $_GET['site_id'] ) || empty( $_GET['site_id'] ) ) {

						Jetpack::state( 'missing_site_id', esc_html__( 'Site ID must be provided to disconnect a sub-site.', 'jetpack' ) );

						break;

					}

					$this->do_subsitedisconnect();

					break;