Yii2.0-单文件上传

Yii2.0-单文件上传

error: 需打开php.ini fileinfo扩展

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创建控制器FormController

<?php  namespace frontend\controllers;use Yii;use yii\web\Controller;use frontend\models\Uploads;use yii\web\UploadedFile;class FormController extends Controller{    public function actionMyfile(){        $model=new Uploads();        return $this->render('myfile',['model'=>$model]);    }    public function actionGetfile(){        $model = new Uploads();        if (Yii::$app->request->isPost) {            $model->imgFile = UploadedFile::getInstance($model, 'imgFile');            //////验证大小            $fileSize=$model->imgFile->size;            $maxSize=1024*1024*10;            $minSize=1;            if($fileSize>$minSize&&$fileSize<$maxSize){                if ($model->upload()) {                    // 文件上传成功                    echo '上传成功';                }            }else{                echo 'error';            }        }    }

创建模型Uploads.php

<?phpnamespace frontend\models;use Yii;use yii\base\Model;use yii\web\UploadedFile;class Uploads extends Model{    public $imgFile;    //验证    public function rules(){        return [            [['imgFile'], 'file','extensions' => 'png, jpg','maxSize'=>1024*1024*10,'minSize'=>1],        ];    }    //上传        public function upload(){        if ($this->validate()) {            $this->imgFile->saveAs('uploads/' . $this->imgFile->baseName . '.' . $this->imgFile->extension);            return true;        } else {            return false;        }    }}   

注意这里我们没有用model->load(…)，而是用了UploadedFile::getInstance(…)。区别是后者不会执行model−>validate()，所以需要手动的去执行model->validate()来检验数据的合法性。如果检验通过了，上传的文件保存在uploads文件夹下，即web目录下的uploads里。

上传文件不能为空

public function rules(){    return [        [['file'], 'file', 'skipOnEmpty' => false],    ];}

创建视图/views/form/myfile.php

<?phpuse yii\helpers\Html;use yii\widgets\ActiveForm;$form = ActiveForm::begin([    'id' => 'login-form',    'options' => ['class' => 'form-horizontal','enctype' => 'multipart/form-data'],    'action'=>'?r=form/getfile',    'method'=>'post']) ?>    <?= $form->field($model, 'imgFile')->fileInput() ?>    <div class="form-group">        <div class="col-lg-offset-1 col-lg-11">            <?= Html::submitButton('上传', ['class' => 'btn btn-primary']) ?>        </div>    </div><?php ActiveForm::end() ?>