CodeIgniter Function Upload DropZone

officeAction.php

    function addFile($act=null,$randomKey=null)
	{
        $this->load->model('ManajemenSuratFileModel');

		if ($act == 'removeFile') {
			
			$token=$this->input->post('token'); //exit(var_dump($token));
	    	$randomKey=$this->input->post('randomKey');

	    	$data = $this->db->get_where('manajemen_surat_file',array('token'=>$token,'random_key'=>$randomKey)); //exit(dump(show_last_query()));

	    	if($data->num_rows()>0){
				$hasil=$data->row();
				$nama_file=$hasil->nama_file;

				$data_real = ROOTPATH.'/supports/office/'.$nama_file;

				// Add to array list
				$the_files_is_here = array($data_real);

				// Multiple File's
				foreach ($the_files_is_here as $file) {
					unlink($file);
				}

				// Single File
				// if(file_exists($file=ROOTPATH.'/foto/real/'.$nama_foto)){
				// 	unlink($file);
				// }
				$this->db->delete('manajemen_surat_file',array('token'=>$token,'random_key'=>$randomKey));
			}

		}elseif ($act == 'formFile') {
			$data['randomKey'] = $randomKey;
    		$this->load->view('Office/formFile',$data);
		}
		elseif ($act == 'formListFile' && isset($randomKey)) {
			
			$this->load->helper("file");
    		$this->set('randomKey',$randomKey);

        	# source: https://www.startutorial.com/articles/view/dropzonejs-php-how-to-display-existing-files-on-server

        	$storeFolder = ROOTPATH.'/supports/office/';
        	$ds          = DIRECTORY_SEPARATOR; 
        	$datas 		 = $this->db->get_where('manajemen_surat_file',array('random_key'=>$randomKey))->result_array(); //exit(dump(show_last_query()));
        	$result  	 = array();
		    $files 		 = scandir($storeFolder); //exit(dump($files));

		    # Show's only File You Have!
		    if ( false!==$files ) {
		        foreach ( $datas as $data ) {  			// Ambil data berdasarkan ID Dokter
		        	if ( '.'!=$files && '..'!=$files) { 	// Abaikan Folder
	        			$obj['name'] = $data['nama_file'];
		                $obj['size'] = filesize($storeFolder.$ds.$data['nama_file']);
		                $obj['token']= $data['token'];
		                $obj['randomKey'] = $randomKey;
		                $result[] = $obj;
					}
		        }
		    }
		     
			header("Content-type: text/json");
			header("Content-type: application/json");
			echo json_encode($result);
		}
		elseif ($act == 'addFile') {
			
			$this->load->model('ManajemenSuratFileModel');
			$this->load->helper(array('layout','debug'));

    		$config['upload_path']   = ROOTPATH.'/supports/office';
	        $config['allowed_types'] = 'pdf|doc|docx|xls|xlsx';
	        $config['encrypt_name']	 = true;

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

	        if($this->upload->do_upload('userfile')){
	        	$token=$this->input->post('token');
	        	$randomKey=$this->input->post('randomKey');
	        	$data=$this->upload->data(); //exit(dump($data));
	        	
	        	$source = ROOTPATH.'/supports/office'.$data['file_name'];

                $random = $data['file_name'];
	        	$file = $data['orig_name'];

	        	$data_file = array(
					'random_key' => $randomKey,
                    'nama_file' => $file,
                    'random_name' => $random,
                    'token' => $token,
                    'user_create' => $this->auth->get_user_id(),
				);

				//exit(var_dump($data_foto));
				$this->ManajemenSuratFileModel->save($data_file); //exit(var_dump(show_last_query()));
	       	}
		
		}
    }