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。