Import ไฟล์ Excel ผ่าน PHP ไปยัง MySQL ไม่ได้ ติด Notice : Undefined offset และข้อมูลเป็นภาษาต่างดาว

	public function dump_dvt_data()
	{
		$config['upload_path']		= './uploads/dump/xls/dvt_data/';
		$config['allowed_types']	= 'xml|xlsx|xls';
		$config['max_size']			= '0';
		$config['overwrite']		= FALSE;
		$this->load->library('upload',$config);
		$this->upload->do_upload('dump_dvt_data_file');
		$upload = $this->upload->data('dump_dvt_data_file');
		//$this->load->view('modal_popup/dump_dvt_data_success');

		$link = mysqli_connect("localhost","admin","nimdaintranet1220")or die(mysql_error());
		mysql_select_db("dvt_management");
		if(isset($_FILES['dump_dvt_data_file']))
		{
			$excel_file = './uploads/dump/xls/dvt_data/'.$_FILES['dump_dvt_data_file']['name'];
			if(!is_file($excel_file))
				exit('File not found.');

			if(($handle = fopen($excel_file, "r")) !== FALSE)
			{
				$data = fgetcsv($handle, 1000, ",");
				while(($data = fgetcsv($handle, 1000, ",")) !== FALSE)
				{
					$sql = "INSERT INTO dvt_profile
							VALUES(
									'',
									'".$data[0]."',
									'".$data[1]."',
									'".$data[2]."',
									'".$data[3]."',
									'".$data[4]."',
									'".$data[5]."',
									'".$data[6]."',
									'".$data[7]."',
									'".$data[8]."',
									'".$data[9]."',
									'".$data[10]."',
									'".$data[11]."',
									'".$data[12]."',
									'".$data[13]."',
									'".$data[14]."',
									'".$data[15]."',
									'".$data[16]."',
									'".$data[17]."',
									'".$data[18]."',
									'".$data[19]."',
									'".$data[20]."',
									'".$data[21]."',
									'".$data[22]."',
									'".$data[23]."',
									'".$data[24]."',
									'".$data[25]."',
									'".$data[26]."',
									'".$data[27]."',
									'".$data[28]."',
									'".$data[29]."',
									'',
									'',
									'',
									'',
									'',
									''
						)";
					mysql_query("SET NAMES utf8");
					mysql_query($sql);
				}
				fclose($handle);
			}
		}
	}