前后共用同一个域名最简单方法

例如后台文件为admin，则在frontend/web下创建admin，并将backend/web/中的assets和index.php复制到admin文件下将admin/index.php文件修改为

defined('YII_DEBUG') or define('YII_DEBUG', true);
defined('YII_ENV') or define('YII_ENV', 'dev');

require __DIR__ . '/../../../vendor/autoload.php';
require __DIR__ . '/../../../vendor/yiisoft/yii2/Yii.php';
require __DIR__ . '/../../../common/config/bootstrap.php';
require __DIR__ . '/../../../backend/config/bootstrap.php';

$config = yii\helpers\ArrayHelper::merge(
    require __DIR__ . '/../../../common/config/main.php',
    require __DIR__ . '/../../../common/config/main-local.php',
    require __DIR__ . '/../../../backend/config/main.php',
    require __DIR__ . '/../../../backend/config/main-local.php'
);

(new yii\web\Application($config))->run();

输入127.0.0.1/frontend/web/admin/index.php就能访问后台文件