Yii 使用Cookies

Cookies允许数据在请求之间持久化。在PHP中，您可以通过 $_COOKIE 变量访问它们。Yii将cookie表示为 yii\web\Cookie 类的对象。在本章中，我们描述了几种读取cookie的方法。

步骤1 - 在 SiteController 中创建一个 actionReadCookies 方法。

public function actionReadCookies() { 
   // get cookies from the "request" component 
   cookies = Yii::app->request->cookies; 
   // get the "language" cookie value 
   // if the cookie does not exist, return "ru" as the default value 
   language =cookies->getValue('language', 'ru'); 
   // an alternative way of getting the "language" cookie value 
   if ((cookie =cookies->get('language')) !== null) { 
      language =cookie->value; 
   } 
   // you may also use cookies like an array   if (isset(cookies['language'])) { 
      language =cookies['language']->value; 
   } 
   // check if there is a "language" cookie 
   if (cookies->has('language')) echo "Current language:language"; 
}

步骤2 − 为了看到发送cookie的效果，在 SiteController 中创建一个名为 actionSendCookies 的方法。

public function actionSendCookies() { 
   // get cookies from the "response" component 
   cookies = Yii::app->response->cookies; 
   // add a new cookie to the response to be sent 
   cookies->add(new \yii\web\Cookie([      'name' => 'language',      'value' => 'ru-RU',   ]));cookies->add(new \yii\web\Cookie([
      'name' => 'username', 
      'value' => 'John', 
   ])); 
   $cookies->add(new \yii\web\Cookie([ 
      'name' => 'country', 
      'value' => 'USA', 
   ])); 
}

步骤3 − 现在，如果你去访问 http://localhost:8080/index.php?r=site/send-cookies ，你会注意到浏览器中保存了cookie。

在Yii中，默认情况下启用了cookie验证。它保护cookie免受客户端篡改。来自config/web.php文件的哈希字符串对每个cookie进行签名。

<?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' => 'ymoaYrebZHa8gURuolioHGlK8fLXCKjO', 
         ],** 
         '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'], 
                ], 
            ], 
         ], 
         'urlManager' => [ 
            //'showScriptName' => false, 
            //'enablePrettyUrl' => true, 
            //'enableStrictParsing' => true, 
            //'suffix' => '/' 
         ], 
         'db' => require(__DIR__ . '/db.php'), 
      ], 
      'modules' => [ 
         'hello' => [ 
            'class' => 'app\modules\hello\Hello', 
         ], 
      ], 
      'params' => params,
   ];   if (YII_ENV_DEV) {      // configuration adjustments for 'dev' environmentconfig['bootstrap'][] = 'debug'; 
      config['modules']['debug'] = [         'class' => 'yii\debug\Module',      ];config['bootstrap'][] = 'gii'; 
      config['modules']['gii'] = [         'class' => 'yii\gii\Module',      ];   }   returnconfig; 
?>

通过将 yii\web\Request::$enableCookieValidation 属性设置为 false ，您可以禁用cookie验证。