CONTOH UPLOAD FILE

function fileupload($file_array, $post)
	{
		$response  = array();
		/*BEGIN FILE UPLOADING CODE */
		$uploaded_files = array();

		if(isset($file_array['input01']) && $file_array['input01']['name']!="")
		{
			$currentfile_extension = end(@explode(".",$file_array['input01']['name']));
			if ($currentfile_extension == 'jpeg' || 'jpg' || 'png')
			{
				if (isset($post['kd_brng']))
				{
					$cek = $this->m_all->cek($post['kd_brng'],'kd_brng','tb_barang');
					if ($cek->num_rows() > 0)
					{
						foreach ($cek->result() as $row)
						{
							$kode = $row->kd_brng;
							$nama = $row->nm_brng;
						}
						$nama_foto = $kode.'_'.$nama.'_'.date("YmdHis").rand(1000,9999).'.'.$currentfile_extension;
						$target = "data/ft_brng/".basename($nama_foto);
						if(@move_uploaded_file($file_array['input01']['tmp_name'], $target))
						{
							$info = array(
								'id_foto' 	=> $this->auth->get_jumlah($this->primary, $this->table) + 1,
								'nm_foto'	=> $nama_foto,
								'alamat'	=> $target,
								'alamat_url'=> base_url($target),
								'brng_id'	=> $post['kd_brng'],
								'type_img'	=> $currentfile_extension,
								'update_date'=>date('Y-m-d H:i:s',now()),
								'update_user'=>$this->session->userdata('username')
							);
							$this->m_all->simpan($info, $this->table);
							$response['status']= "sukses";
							$response['pesan'] = "File has been added successfully.";
					//$response['url'] = site_url("user_ktr/preview_excell");
						} else {
							$response['status']= "gagal";
							$response['pesan'] = "Error in file uploading.";
						}
					}
					else {
						$response['status']= "gagal";
						$response['pesan'] = "data null kode barang";
					}
				}
				else {
					$response['status']= "gagal";
					$response['pesan'] = "null kode barang";
				}

			}
			else {
				$response['status']= "gagal";
				$response['pesan'] = "Format JPEG/JPG/PNG";
			}
		}
		/*END FILE UPLOADING CODE */
		echo json_encode($response);
	}