controller upload multiple file

<?php

/**
 * @Author: juliarnasution
 * @Date:   2020-03-21 17:03:07
 * @Last Modified by:   Dell
 * @Last Modified time: 2020-03-21 17:13:49
 */


class Dokumen extends CI_Controller
{
    public function uploadfile()
    {
        if(array_key_exists('file1',$_FILES) && $_FILES['file1']['size']>0){
            $file1 = $this->upload_file1('file1');//upload $)FILES['file1'];
            if ($file1['result']==false) {
                echo "error : gagal di upload";
            }else{
                echo "file1 berhasil di upload";
            }
        }

        if(array_key_exists('file2',$_FILES) && $_FILES['file2']['size']>0){
            $file2 = $this->upload_file2('file2');//upload $)FILES['file2'];
            if ($file2['result']==false) {
                echo "error : gagal di upload";
            }else{
                echo "file2 berhasil di upload";
            }
        }
    }

    public function upload_file1($data)
    {
        $config['upload_path'] = './files' ;
        $config['allowed_types'] = 'jpg|jpeg|png';
        $config['max_size']  = '400';
        $config['remove_space'] = TRUE;
        $config['file_name'] = $data;

        $this->load->library('upload', $config,'file1');//membuat object dengan nama file1
        $this->file1->initialize($config);
        if (!$this->file1->do_upload($data)){
            return array('result'=>FALSE,'file'=>'','error' => $this->file1->display_errors());
        }
        else{
            return array('result'=>TRUE,'file'=>$this->file1->data(),'upload_data' => $this->file1->data());
        }
    }

    public function upload_file2($data)
    {
        $config['upload_path'] = './files' ;
        $config['allowed_types'] = 'jpg|jpeg|png';
        $config['max_size']  = '400';
        $config['remove_space'] = TRUE;
        $config['file_name'] = $data;

        $this->load->library('upload', $config,'file2');//membuat object dengan nama file2
        $this->file2->initialize($config);
        if (!$this->file2->do_upload($data)){
            return array('result'=>FALSE,'file'=>'','error' => $this->file2->display_errors());
        }
        else{
            return array('result'=>TRUE,'file'=>$this->file2->data(),'upload_data' => $this->file2->data());
        }
    }
}
?>