Cookie允许数据跨请求持久化。在PHP中，可以通过 $_COOKIE 变量访问它们。Yii 中表示 cookie 作为 yii\web\Cookie 类的一个对象。在本章中，我们描述了读取 cookie 的方法。
第1步- 在 SiteController 创建一个动作 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 "Py" as the default value
$language = $cookies->getValue('language', 'Py');
// an alternative way of getting the "language" cookie value
if (($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 - 在 SiteController 创建一个名为动作 actionSendCookies ()方法用于发送 cookie 到客户端。
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' => 'Chinese',
]));
$cookies->add(new \yii\web\Cookie([
'name' => 'username',
'value' => 'Hippo',
]));
$cookies->add(new \yii\web\Cookie([
'name' => 'country',
'value' => 'China',
]));
}
第3步 - 现在，打开 http://localhost:8080/index.php?r=site/send-cookies， 你会发现 cookies 已经保存在浏览器内。
在Yii中默认情况下，cookie验证已启用。它保护 cookies 在客户端被别人修改。在 config/web.php 文件使用哈希字符串签名每个 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' => 'ywfdsa7829347898fLXfsCfdKjfO-fss0',
], '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' => [
'admin' => [
'class' => 'app\modules\admin\Admin',
],
],
'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 $config;
?>
可以通过设置 yii\web\Request::$enableCookieValidation 属性为 false。
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