undefined offset 0 PHP

Question

我上传了一个存储到数组$ allDataInSheet中的excel文件，并尝试在视图中print_r它。这是结果：

Array ([0] => 15220) Array ([0] => 15224)

控制器：

$file_data = $this->upload->data();
                $file_path =  FCPATH.'kirim_undangan/';
                require_once APPPATH  .'third_party/PHPExcel.php';
              	require_once APPPATH  .'third_party/PHPExcel/IOFactory.php';
				

                $inputFileName = $file_path; 
                $inputFileName;
                $objPHPExcel = PHPExcel_IOFactory::load($inputFileName);
                $allDataInSheet = $objPHPExcel->getActiveSheet()->toArray(null,true,true,true);
                $arrayCount = count($allDataInSheet);  // Here get total count of row in that Excel sheet
                $regex = "~\d{5}~";
                $dataexcel = Array();
               for($i=1;$i<=$arrayCount;$i++)
               {

                    $dataexcel['to_name']=$allDataInSheet[$i]["A"];
                    $dataexcel['to_address']=$allDataInSheet[$i]["B"];
                    $dataexcel['to_phone']=$allDataInSheet[$i]["C"];
                    preg_match($regex, $allDataInSheet[$i]["B"], $result);
					$dataexcel['to_zipcode'] = $result;
                } 

			$data_user = array(

				'request_Id'					=> $this->input->post('id'),
				'email'			 				=> $this->input->post('email'),
				'name'      	 				=> $this->input->post('from_nama'),
				'phone' 			 			=> $this->input->post('from_phone'),
				'status'           	 			=> '0',
				'unique_id' 	        		=> uniqid()


			    );


            $this->load->model('excel');
            $this->excel->tambahuser($allDataInSheet,$data_user);

我的模特：

function tambahuser($allDataInSheet,$data_user)
    {
        $regex = "~\d{5}~";
        $this->db->insert('request', $data_user);
        $request_id = $this->db->insert_id();

        foreach ($allDataInSheet as $key)     
        {
            preg_match($regex, $key['B'], $result);       

            $data = array(
                'request_id'         =>   $request_id,
                'from_name'          =>   $this->input->post('from_nama'),
                'from_phone'         =>   $this->input->post('from_phone'),
                //'from_address'       =>   $this->input->post('from_address'),
                'to_name'           => $key['A'],
                'to_phone'          => $key['C'],
                'to_address'        => $key['B'],
                'to_zipcode'        => $result[0], //this is where the error comes
                'tariff'            => '0',
            );
            print_r($result);
            $this->db->insert('excel', $data);
        }

但我得Undefined Offset = 0。

我做错了什么？因为[0]数组不是NULL;