<?php
require 'vendor/autoload.php';
$data = array('foo' => '150000197301');
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
$sheet = $spreadsheet->getSheet(0);
$sheet->fromArray($data, null, 'A1');
$sheet->getStyle('A1:A1')
    ->getNumberFormat()
    ->setFormatCode(\PhpOffice\PhpSpreadsheet\Style\NumberFormat::FORMAT_TEXT);
$writer = new \PhpOffice\PhpSpreadsheet\Writer\Xlsx($spreadsheet);
$filename = 'test_' . PHP_VERSION . '.xlsx';
$writer->save($filename);