register-mdb-pro.php

<?php
/**
 * Implements register_wpmdbpro command.
 */
class MDB_Pro_Command extends WP_CLI_Command {

	/**
	 * Registers WP Migrate DB Pro.
	 *
	 * ## OPTIONS
	 *
	 * <serial>
	 * : The serial for delicious brains
	 *
	 * ## EXAMPLES
	 *
	 *     wp example register 1234567890
	 *
	 * @synopsis <serial>
	 */
	function register( $args ) {
		list( $serial ) = $args;

		$settings = get_option('wpmdb_settings');
		$settings['licence'] = $serial;
		update_option( 'wpmdb_settings', $settings );
		WP_CLI::success( "Added serial!" );
	}
}

WP_CLI::add_command( 'mdbpro', 'MDB_Pro_Command' );