<?php
/**
 * Created by PhpStorm.
 * User: 鵬鵬
 * Date: 2016/12/6
 * Time: 11:09
 */
namespace frontend\controllers;
use Yii;
use frontend\models\UploadForm;
use yii\web\UploadedFile;
class UploadController extends \yii\web\Controller
{
public function actionUpload()
    {
     //例項化model
      $model = new 
 
UploadForm();
     //接值
if (Yii::$app->request->isPost) {
$model->file = UploadedFile::getInstance($model, 'file');
        //驗證
       if ($model->file && $model->validate()) {
$fileName = date("Ymd H:i:s").$model->file->baseName . "." .$model->file->extension;
                 //圖片的路徑
                 
 
$dir = 'uploads'."/". $fileName;
                //儲存
                $model->file->saveAs($dir);
//$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
}
        }
return $this->render('upload', ['model' => $model]);
    }
}




model層uploadfrom.php



 

<?php
/**
 * Created by PhpStorm.
 * User: 鵬鵬
 * Date: 2016/12/6
 * Time: 11:06
 */
namespace frontend\models;
use yii\base\Model;
use yii\web\UploadedFile;
/**
 * UploadForm is the model behind the upload form.
 */
class UploadForm extends Model
{
/**
     * @var UploadedFile file attribute
     */
public $file;
/**
     * @return array the validation rules.
     */
public function rules()
    {
return [
            [['file'],'file']
        ];
    }
}

<?php
use yii\widgets\ActiveForm;
use yii\helpers\Html;
?><?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?><?= $form->field($model,'file')->fileInput() ?><button>提交</button>

<?php ActiveForm::end() ?><?= Html::img('@web/uploads/1.jpg', ['alt' => 'My logo']) ?>