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                [TOC] # 配置user組件 我們還要配置一下user組件,它是一個核心組件,默認的class是[yii\\web\\User](http://www.yiichina.com/doc/api/2.0/yii-web-user),我們要配置的是其它屬性,示例如下: ~~~php 'user' => [ 'identityClass' => 'app\models\User', //用戶實體類,一般設定為用戶表的AR模型類 'enableAutoLogin' => true, ], ~~~ # 執行登錄 有了IdentityInterface接口的實現類和配置,接下來做登錄就是幾句代碼的事了 以下代碼測試之前,先確認一下瀏覽器顯示當前站點有哪些Cookie,確認完后再開始執行以下代碼: ~~~php $user = \app\models\User::findOne($測試用戶ID); if(Yii::$app->user->login($user)){ echo '登錄成功!'; } ~~~ 然后你會發現瀏覽器多了`_identity`這個Cookie # 判斷是否登錄 上面登錄成功后,以后要判斷是否登錄可以用user組件的isGuest屬性來判斷: ~~~php if(Yii::$app->user->isGuest){ //判斷是否游客 echo '游客身份'; //Yii::$app->response->redirect('/login.html'); }else{ echo '您已登錄,用戶ID是:' . Yii::$app->user->id; } ~~~ # 退出登錄 這就是一句代碼的事情了:`Yii::$app->user->logout()`然后`_identity`這個Cookie就不見了,再訪問isGuest也會返回true
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