Yii2框架配置文件(Application属性)与调试技巧实例分析

<?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'= '张三','age'= 22]);
}

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