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我们先来看看在yii2中支持的图片上传怎么进行处理的。

首先我们创建model\Upload.php文件

<?php

namespace backend\models;

use Yii;

use yii\web\UploadedFile;

class Upload extends \yii\db\ActiveRecord

{

/**

* @var UploadedFile|Null file attribute

*/

public $file;

/**

* @return array the validation rules.

*/

public function rules()

{

return [

[["file"], "file",],

];

}

}

下面我们看看view层是怎么渲染的

<?php

use yii\widgets\ActiveForm;

$form = ActiveForm::begin(["options" => ["enctype" => "multipart/form-data"]]); ?>

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

<button>Submit</button>

<?php ActiveForm::end(); ?>

最后实现controller层的实现

namespace backend\controllers;

use backend\models\Upload;

use yii\web\UploadedFile;

class ToolsController extends \yii\web\Controller

{

/**

* 文件上传

* 我们这里上传成功后把图片的地址进行返回

*/

public function actionUpload ()

{

$model = new Upload();

$uploadSuccessPath = "";

if (Yii::$app->request->isPost) {

$model->file = UploadedFile::getInstance($model, "file");

//文件上传存放的目录

$dir = "../../public/uploads/".date("Ymd");

if (!is_dir($dir))

mkdir($dir);

if ($model->validate()) {

//文件名

$fileName = date("HiiHsHis").$model->file->baseName . "." . $model->file->extension;

$dir = $dir."/". $fileName;

$model->file->saveAs($dir);

$uploadSuccessPath = "/uploads/".date("Ymd")."/".$fileName;

}

}

return $this->render("upload", [

"model" => $model,

"uploadSuccessPath" => $uploadSuccessPath,

]);

}

}

以上所述是小编给大家介绍的Yii2使用自带的UploadedFile实现的文件上传的相关知识，希望对大家有所帮助