$uploads = UploadedFile::getInstancesByName("upfile"); if (empty($uploads)){ return "Must upload at least 1 file in upfile form-data POST"; } // $uploads now contains 1 or more UploadedFile instances $savedfiles = []; foreach ($uploads as $file){ $path = //Generate your save file path here; $file->saveAs($path); //Your uploaded file is saved, you can process it further from here }