<?phpnamespace 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",],];}}

<?phpuse yii/widgets/ActiveForm;$form = ActiveForm::begin(["options" => ["enctype" => "multipart/form-data"]]); ?><?= $form->field($model, "file")->fileInput() ?><button>Submit</button><?php ActiveForm::end(); ?>

namespace backend/controllers;use backend/models/Upload;use yii/web/UploadedFile;class ToolsController extends /yii/web/Controller{/*** 文件上傳* 我們這里上傳成功后把圖片的地址進(jìn)行返回*/public function actionUpload (){$model = new Upload();$uploadSuccessPath = "";if (Yii::$app->request->isPost) {$model->file = UploadedFile::getInstance($model, "file");//文件上傳存放的目錄$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,]);}}