YII文件上传

<span style="font-size:14px;">use yii\web\UploadedFile;

public function actionDoartadd(){

        //获取session

        $session            = Yii::$app->session;

        $session->open();

        $user_id = $session->hasSessionId;

        $db = User::find()->where(['id'=>"$user_id"])->asarray()->one();

        $user_name = $db['username'];

        $model = new Article();

        $model->attributes          = $_POST;

        /****图片上传start***/

        $image = UploadedFile::getInstance($model, 'article_thumb');

        if(!empty($image)){

            $rootPath = "uploads/operate/";

            $ext = $image->getExtension();

            $randName = time() . rand(1000, 9999) . "." . $ext;

            $image->saveAs($rootPath . $randName);

            $model->article_thumb       = $rootPath.$randName;

            $model->user_id             = $user_id;

            $model->user_name           = $user_name;

            $model->article_addtime     = time();

            $rs                         = $model->save();

        }

        /****图片上传end***/

        $last_id = Yii::$app->db->getLastInsertID();

        $lable_id           = $_POST['lable_id'];

        if(count($lable_id)>3){

            Yii::$app->getSession()->setFlash('error', '最多添加三个标签');

            return $this->redirect('index.php?r=operate/artadd');

            die;

        }

        foreach($lable_id as $k=>$attributes)

        {

            $customer = new Lable();

            $customer->article_id   = $last_id;

            $customer->artlable_id  = $attributes;

            $customer->save();

        }

        if($rs>0){

            Yii::$app->getSession()->setFlash('success', '添加成功');

            return $this->redirect('index.php?r=operate/index');

        }else{

            Yii::$app->getSession()->setFlash('error', '添加失败');

            return $this->redirect('index.php?r=operate/artadd');

        }

    }

<?= $form->field($model, 'course_thumb')->fileInput(['id' => 'change_img']) ?>

</span>

YII文件上传的相关教程结束。