文件上传怎么弄？ [ 2.0 版本 ]

视图：
<?php
use yii\widgets\ActiveForm;
use yii\helpers\Html;
?>
<?php $form=ActiveForm::begin(['options'=>['enctype'=>'multipart/form-data'],'action'=>['upload/file'],'method'=>'post',])?>
<?=$form->field($model,'file[]')->fileInput(['multiple'=>true])?>
<?php echo Html::submitButton('提交',['class' => 'btn btn-primary'])?>
<?php ActiveForm::end();?>

现在yii有很多vender资源去找下，下载的资源，或者你可以写个原生，或者yii的上传，文档中有

/**

 * 
 * @param string|array $uploadedFile 输入框名称 或者 [model,attribute]
 * @param type $directory
 * @return JsonResponse
 * @throws ApiException
 */
public function uploadOne($uploadedFile, $directory = '')
{
    try {
        if ($directory) {
            $this->uploadDir .= DIRECTORY_SEPARATOR . $directory;
        }
        if (is_string($uploadedFile)) {
            $upload = UploadedFile::getInstanceByName($uploadedFile);
            $name = $uploadedFile;
        } else if (is_array($uploadedFile) && isset($uploadedFile['model']) && isset($uploadedFile['attribute'])) {
            $upload = UploadedFile::getInstance($uploadedFile['model'], $uploadedFile['attribute']);
            $name = $uploadedFile['attribute'];
        }

        if ($upload !== null) {
            $this->saveName .= '.' . $upload->getExtension();
            if (!in_array($upload->getExtension(), $this->pictureConfig['allowType'])) {
                throw new ApiException(JsonResponseMsg::TYPE_NOT_ALLOWED, JsonResponseCode::TYPE_NOT_ALLOWED);
            }
            $originalPath = $this->uploadDir . DIRECTORY_SEPARATOR . $this->pictureConfig['originalDir'] . DIRECTORY_SEPARATOR . $this->savePath . DIRECTORY_SEPARATOR;
            $file = $this->apiWebPath . $originalPath . $this->saveName;
            $this->createDir($this->apiWebPath . $originalPath);
            if ($upload->saveAs($file) && $this->water($file) && $this->text($file) && $this->thumb($file)) {
                JsonResponse::success()->pushData($name, ['savePath' => $originalPath, 'saveName' => $this->saveName, 'file' => $originalPath . $this->saveName]);
            } else {
                if ($upload->getHasError()) {
                    $code = $upload->error;
                    switch ($code) {
                        case UPLOAD_ERR_INI_SIZE:
                            $message = "The uploaded file exceeds the upload_max_filesize directive in php.ini";
                            break;
                        case UPLOAD_ERR_FORM_SIZE:
                            $message = "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form";
                            break;
                        case UPLOAD_ERR_PARTIAL:
                            $message = "The uploaded file was only partially uploaded";
                            break;
                        case UPLOAD_ERR_NO_FILE:
                            $message = "No file was uploaded";
                            break;
                        case UPLOAD_ERR_NO_TMP_DIR:
                            $message = "Missing a temporary folder";
                            break;
                        case UPLOAD_ERR_CANT_WRITE:
                            $message = "Failed to write file to disk";
                            break;
                        case UPLOAD_ERR_EXTENSION:
                            $message = "File upload stopped by extension";
                            break;

                        default:
                            $message = "Unknown upload error";
                            break;
                    }
                    JsonResponse::setMessage($message);
                    JsonResponse::setCode(JsonResponseCode::PICTURE_UPLOAD_FAILED);
                }
                @unlink($file);
            }
        } else {
            $message = "No file was uploaded";
            JsonResponse::setMessage($message);
        }
    } catch (\Exception $ex) {
        if ($ex instanceof ApiException) {
            $code = $ex->getCode();
        } else {
            $code = JsonResponseCode::FAIL;
        }
        JsonResponse::fail($code, $ex->getMessage());
    }
    return JsonResponse::getInstance();
}

public function thumb($filename)
{

    if ($this->pictureConfig['thumb'] === false) {
        return true;
    }
    $thumbDir = $this->pictureConfig['thumbDir'];
    $savePath = $this->uploadDir . DIRECTORY_SEPARATOR . $thumbDir . DIRECTORY_SEPARATOR . $this->savePath . DIRECTORY_SEPARATOR;
    $saveName = basename($filename);
    $this->createDir($this->apiWebPath . $savePath);
    $this->setImagesize($filename);
    if ($this->imagesize) {
        $width = round($this->imagesize[0] / $this->pictureConfig['minification']);
        $height = round($this->imagesize[1] / $this->pictureConfig['minification']);
        $this->checkImgSize($filename);
        //Image::thumbnail($filename, $width, $height)->save($this->apiWebPath . $savePath . $saveName);

        JsonResponse::pushData('thumb', ['savePath' => $savePath, 'saveName' => $saveName]);
        return true;
    }
    return false;
}

private function checkImgSize($filename)
{
    $this->setImagesize($filename);
    if ($this->imagesize[0] > 3000 || $this->imagesize[1] > 3000) {
        throw new ApiException(JsonResponseMsg::PICTURE_SIZE_TOO_BIG, JsonResponseCode::PICTURE_UPLOAD_FAILED);
    }
}

private function water($filename)
{
    try {

        if ($this->pictureConfig['water'] === false) {
            return true;
        }
        $this->checkImgSize($filename);
        $waterPosition = $this->pictureConfig['waterPosition'];
        $waterPicture = $this->pictureConfig['waterPicture'];
        if (!$waterPosition) {
            $imagesize = @getimagesize($waterPicture);
            $this->setImagesize($filename);
            $waterPosition = [mt_rand(0, abs($this->imagesize[0] - $imagesize[0])), mt_rand(0, abs($this->imagesize[1] - $imagesize[1]))];
        }
        Image::watermark($filename, $waterPicture, $waterPosition)->save();
        return true;
    } catch (\Exception $ex) {
        
    }
    return false;
}

public function text($filename)
{
    try {
        if ($this->pictureConfig['text'] === false) {
            return true;
        }
        $this->checkImgSize($filename);
        $textPosition = $this->pictureConfig['textPosition'];
        if (!$textPosition) {
            $textPosition = [0, 0];
        }
        Image::text($filename, $this->pictureConfig['waterText'], $this->pictureConfig['waterFont'], $textPosition, ['color' => $this->pictureConfig['textColor'], 'size' => $this->pictureConfig['textSize']])->save();
        return true;
    } catch (\Exception $ex) {
        
    }
    return false;
}

private function createDir($dir)
{
    if (!file_exists($dir) || !is_dir($dir)) {
        mkdir($dir, 0777, true);
    }
}

private function setImagesize($filename)
{
    $this->imagesize === null && $this->imagesize = @getimagesize($filename);
}

这是一个支持单文件 多文件上传的

控制器

 public function actionFiles(){
    $request = yii::$app->request;
    $model = new My_files();
    $flag = 1;

    if($request->isPost){
        $post = $request -> post();
        $imgs = UploadedFile::getInstances($model, 'img');
        if($imgs){
            foreach ($imgs as $img) {
                $filename = 'uploads/img_' . time() . rand(1111,9999) . '.' . $img->extension;
                $img->saveAs($filename);

                $files = clone $model;
                $files -> img = $filename;
                // var_dump($files);die;
                if(!$files -> save(false)){
                    $flag = 0;
                    return $this->rendercontent('上传失败');
                }
            }
        }
        return $this->rendercontent('上传成功');

    }

    if($request->isGet){
        return $this->render('files.php',['model'=>$model]);
    }
}

视图

$form = ActiveForm::begin(['method'=>'post','action' => ['aaa/files']]); ?>

<?= $form->field($model, 'img[]')->fileInput(['multiple' => true]) ->label('上传图片')  ?>

<?= $form->field($model, 'verifyCode')->textInput(['class'=>'dl_textinp'])->label('验证码') ?>
<?= Captcha::widget(['name'=>'captchaimg','captchaAction'=>'aaa/captcha',
    'imageOptions'=>['id'=>'captchaimg', 'title'=>'换一个', 'alt'=>'换一个',
        'style'=>'cursor:pointer;margin-left:25px;'],'template'=>'{image}']);?>

<?= Html::submitButton('点击提交') ?>

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

希望对你有帮助