yii2.0单文件上传和多文件上传

时间：2021-02-14 01:52:41

yii2文件上传使用到yii2自带的文件上传类UploadFIle,以及对应的模型规则，这里分别介绍单文件上传和多文件上传：

yii2单个文件上传：

上传步奏，先创建上传表单模型model（包含验证规则），其次控制器操作action，以及相对应的view:

model层：

Upload.php  [单文件上传模型]

<?php

namespace app\models;
use Yii;
use yii\base\Model;

class Upload extends Model{
    public $file;

    public function rules(){
        return [

            [['file'], 'file', 'extensions' => 'jpg, png', 'mimeTypes' => 'image/jpeg, image/png',],
        ];
    }

    public function attributeLabels(){
        return [
            'file'=>'文件上传'
        ];
    }
}   

UploadForm.php  [多文件上传模型]

<?php
namespace app\models;

use Yii;
use yii\base\Model;

class UploadForm extends Model
{
    /**
     * @var UploadedFile|Null file attribute
     */
    public $file;

    /**
     * @return array the validation rules.
     */
    public function rules()
    {
        return [
            [['file'], 'file', 'maxFiles' => 10,'extensions'=>'jpg,png,gif'],
        ];
    }

    public function attributeLabels(){
        return [
            'file'=>'多文件上传'
        ];
    }

Controller层，以TestController中的upload操作和upmore操作

<?php  
namespace app\controllers;

use Yii;
use yii\web\Controller;
use app\models\Upload;
use app\models\UploadForm;
use yii\web\UploadedFile;

class TestController extends  Controller{

    public function actionIndex(){
        return  $this->renderPartial('index');
    }

    /**
     * @return string|\yii\web\Response
     * 单文件上传
     */
    public function actionUpload(){
        $model= new Upload();

        if (Yii::$app->request->isPost) {
            $file = UploadedFile::getInstance($model, 'file');
            $path='uploads/'.date("YmdH",time()).'/';
            if ($file && $model->validate()) {
                if(!file_exists($path)){
                    mkdir($path,0775,true);
                }
                $file->saveAs($path . time() . '.' . $file->getExtension());
                Yii::$app->session->setFlash('success','上传成功！');
                return $this->redirect('upload');
            }
        }

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

    public function actionUpmore(){
        $model = new UploadForm();
        if (Yii::$app->request->isPost) {
            $file = UploadedFile::getInstances($model, 'file');

            if ($file && $model->validate()) {
                echo "<pre/>";

                foreach ($file as $fl) {
                    $fl->saveAs('uploads/' .mt_rand(1100,9900) .time() .$fl->baseName. '.' . $fl->extension);
                }
                Yii::$app->session->setFlash('success','上传成功！');
                return $this->redirect('upmore');
            }
        }

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

view:层

[单文件view  uplod.php]

<?php  
use yii\helpers\Html;  
use yii\widgets\ActiveForm;  
?>
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<h4>文件上传</h4>
<?php if(Yii::$app->session->hasFlash('success')):?>
    <div class="alert alert-danger">
        <?=Yii::$app->session->getFlash('success')?>
    </div>
<?php endif ?>
<?php $form=ActiveForm::begin([
    'id'=>'upload',
    'enableAjaxValidation' => false,
    'options'=>['enctype'=>'multipart/form-data']
]);
?>
<?= $form->field($model, 'file')->fileInput();?>
<?=  Html::submitButton('提交', ['class'=>'btn btn-primary','name' =>'submit-button']) ?>
<?php ActiveForm::end(); ?>

</body>
</html>  
[多文件view upmore.php]
<?php  

use yii\helpers\Html;  
use yii\widgets\ActiveForm;  

?>
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<h4>多文件上传</h4>
<?php if(Yii::$app->session->hasFlash('success')):?>
    <div class="alert alert-danger">
        <?=Yii::$app->session->getFlash('success')?>
    </div>
<?php endif ?>
<?php $form=ActiveForm::begin([
    'id'=>'upload',
    'enableAjaxValidation' => false,
    'options'=>['enctype'=>'multipart/form-data']
]);
?>
<?= $form->field($model, 'file[]')->fileInput(['multiple' => true]);?>
<?=  Html::submitButton('提交', ['class'=>'btn btn-primary','name' =>'submit-button']) ?>
<?php ActiveForm::end(); ?>

</body>  
</html>

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