Multiple Store Set up in Magento 2

index.php

<?php
switch ($_SERVER['HTTP_HOST']) {
    case 'www.domain1xx.com.au':
    case 'domain1xx.com.au':
        $params = $_SERVER; $params[\Magento\Store\Model\StoreManager::PARAM_RUN_CODE] = 'domain1xx'; 
        $params[\Magento\Store\Model\StoreManager::PARAM_RUN_TYPE] = 'website'; 
        $bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $params); 
        $app = $bootstrap->createApplication('Magento\Framework\App\Http'); 
        $bootstrap->run($app); 
        break; 
    case 'www.domain2yy.com.au':
    case 'domain2yy.com.au':
        $params = $_SERVER; $params[\Magento\Store\Model\StoreManager::PARAM_RUN_CODE] = 'domain2yy'; 
        $params[\Magento\Store\Model\StoreManager::PARAM_RUN_TYPE] = 'website'; 
        $bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $params); 
        $app = $bootstrap->createApplication('Magento\Framework\App\Http'); 
        $bootstrap->run($app); 
    break; 

    default: 
        Mage::run(); 
    break; 
}