[ask]can't get return value from my function

Code:

function do_upload()

    {

        $config['upload_path'] = realpath('resume_upload');

        $config['allowed_types'] = 'doc|docx|xls|xlsx|ppt|pptx|pdf';

        

        

        $this->load->library('upload', $config);

        $this->load->library('Multi_upload');

        

        $files = $this->multi_upload->go_upload();

    //    var_dump($files);

        if ( ! $files )        

        {

            $error = array('error' => $this->upload->display_errors());

            $error['dynamiccontent'] = 'upload_form';

            $this->load->view('templates/template', $error);

        }    

        else

        {

            $data = array('upload_data' => $files);

            $data['dynamiccontent'] = 'success_upload';

            $this->load->view('templates/template', $data);        

            $c = 0;

            foreach($files as $file){

            $temp[$c] = $file['file'];

            $c++;}

            var_dump($temp);

            return $temp;

          }

        



    }

Code:

$x = $this->do_upload();

foreach($x as $y){

echo $y;

}