Yii 使用Cookies

Cookie允许数据在各个请求之间持续存在。在PHP中，您可以通过 $ _COOKIE 变量访问它们。Yii将cookie作为yii \ web \ Cookie 类的对象。在本章中，我们将介绍几种用于读取Cookie的方法。

步骤1 -创建 actionReadCookies 在该方法中 SiteController 。

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";
}

第2步 - 要查看发送cookie的动作，请 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',
   ]));
}

第3步 - 现在，如果您访问 http：// localhost：8080 / index.php？r = site / send- cookies ，您会注意到Cookie保存在浏览器内。

在Yii中，默认情况下启用cookie验证。它可以保护cookie不会在客户端被修改。来自config / web.php文件的哈希字符串标记每个cookie。

<?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' environment
      $config['bootstrap'][] = 'debug';
      $config['modules']['debug'] = [
         'class' => 'yii\debug\Module',
      ];
      $config['bootstrap'][] = 'gii';
      $config['modules']['gii'] = [
         'class' => 'yii\gii\Module',
      ];
   }
   return $config;
?>

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

您可以借助 yii \ web \ UploadedFile，models 和 yii \ widgets \ ActiveForm 轻松实现文件上传功能。在根文件夹中创建一个 “上传” 目录。该目 ...