<?php$params = require(__DIR__ . '/params.php');$config = [  'id' => 'basic',  'basePath' => dirname(__DIR__),  'bootstrap' => ['log'],  'components' => [    'request' => [      // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation      'cookieValidationKey' => 'aldjaldjaldjaljd',    ],    'cache' => [      'class' => 'yii/caching/FileCache',    ],    'user' => [      'identityClass' => 'app/models/User',      'enableAutoLogin' => true,    ],    'errorHandler' => [      'errorAction' => 'site/error',    ],    'mailer' => [      'class' => 'yii/swiftmailer/Mailer',      // send all mails to a file by default. You have to set      // 'useFileTransport' to false and configure a transport      // for the mailer to send real emails.      'useFileTransport' => true,    ],    'log' => [      'traceLevel' => YII_DEBUG ? 3 : 0,      'targets' => [        [          'class' => 'yii/log/FileTarget',          'levels' => ['error', 'warning'],        ],      ],    ],    'db' => require(__DIR__ . '/db.php'),    'urlManager' => [      'enablePrettyUrl' => true,      'showScriptName' => false,      'rules' => [      ],    ],  ],  'params' => $params,];if (YII_ENV_DEV) {  // configuration adjustments for 'dev' environment  $config['bootstrap'][] = 'debug';  $config['modules']['debug'] = [    'class' => 'yii/debug/Module',  ];  $config['bootstrap'][] = 'gii';  $config['modules']['gii'] = [    'class' => 'yii/gii/Module',  ];}return $config;

public function actionIndex(){    echo /Yii::$app->id,'<br>';    echo /Yii::$app->name,'<br>';    exit;    return $this->render('index',['username'=>'張三','age'=>22]);}

#...$config = require(__DIR__ . '/../config/web.php');(new yii/web/Application($config))->run();