yii2利用自带UploadedFile实现上传图片的示例

本人搜索了很多关于yii2利用自带UploadedFile实现上传图片介绍,下面我来记录一下。

创建一个 models/UploadForm.php:

    namespace app\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'],
      ];
     }
    }

视图文件

    <?php
    use yii\widgets\ActiveForm;
    ?>

    <?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>

    <?= $form->field($model, 'file')->fileInput() ?>

    <button>Submit</button>

    <?php ActiveForm::end() ?>

控制器

    use app\models\UploadForm;
    use yii\web\UploadedFile;



    public function actionUpload()
    {
     $model = new UploadForm();

     if (Yii::$app->request->isPost) {
      $model->file = UploadedFile::getInstance($model, 'file');

      if ($model->file && $model->validate()) {
       $model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
      }
     }

     return $this->render('upload', ['model' => $model]);
    }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。