Yii2框架配置文件(Application属性)与调试技巧实例分析


						本文实例讲述了Yii2框架配置文件(Application属性)与调试技巧。分享给大家供大家参考，具体如下：

配置文件

Yii2的主要配置文件config\web.php:





<?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;







最后返回的一个数组，数组的key都是Application的属性。

我们到控制器中来访问一下：





public function actionIndex()

{

    echo \Yii::$app->id,'<br>';

    echo \Yii::$app->name,'<br>';

    exit;

    return $this->render('index',['username'=>'张三','age'=>22]);

}









在入口文件web/index.php 里会加载这个config.php 配置文件，来创建一个Application





#...

$config = require(__DIR__ . '/../config/web.php');

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







调试技巧

助手类Yii，服务于整个框架，提供一些基础方法：记录日志、调试等 

\Yii:warning()日志文件runtime/logs/app.log 

\Yii::error() 

\Yii::info() 

\Yii:trace('调试内容','test') 







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希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。