Can not attach file send mail laravel 5

My project use Google Mail. My views:

{!! Form::file('fileToUpload') !!}

My controller:

use Mail;
$input = $request->all();
$data = [
    'confirm' => 'confirm',
    'author' => 'ADMIN',
    'address' => 'mail@mail.com',
    'subject' => 'Send',
    'contents' => 'Hello'];
Mail::send(['view' => 'mail'], $data, function($message) use ($data){
    $message->to($data['address'])
            ->cc($data['address'])
            ->subject($data['subject'])
            ->setBody($data['contents']);
    if(isset($input['fileToUpload'])){
       $message->attach($input['fileToUpload']->getRealPath(),
       array(
           'as' => $input['fileToUpload']->getClientOriginalName(), 
           'mime' => $input['fileToUpload']->getMimeType()));
    }
    $message->from('rootpowercontrol@gmail.com', 'ADMIN');

I can send email. But, attached file can not send. Something went wrong. Anybody help me. Thanks. Source: https://github.com/HoanNguyenIM/package_mail

via InfinityM