php excel

<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
set_time_limit(0);

require __DIR__ . '/vendor/autoload.php';

$file = $_GET['file'];
$code = $_POST['code'];
$name = $_POST['name'];
$quantity = $_POST['quantity'];
$weight = $_POST['weight'];
$price = $_POST['price'];

$path = __DIR__ . '/../documents/' . $file;

if (!file_exists($path)) {
    copy(__DIR__ . '/template.xlsx', $path);
}

//Номер штрих кода	Наименование товара	Кол-во	Вес	Цена закупки
try {
    $excel = PHPExcel_IOFactory::load($path);
    $excel->setActiveSheetIndex(0);
    $sheet = $excel->getActiveSheet();
    $row = 1;
    while ($sheet->cellExists("A$row")) {
        echo "A$row";
        $row++;
    }
    $sheet->setCellValue("A$row", $code)
        ->setCellValue("B$row", $name)
        ->setCellValue("C$row", $quantity)
        ->setCellValue("D$row", $weight)
        ->setCellValue("E$row", $price);
    $writer = PHPExcel_IOFactory::createWriter($excel, 'Excel2007');
    $writer->save($path);
} catch (Exception $e) {
    die($e->getMessage());
}