<?php

// Define the start and end numbers of the range.
$start_number = 263731000000;
$end_number = 263739999999;

// Create an array to store the numbers.
$numbers = [];

// Iterate through the numbers and add them to the array.
for ($i = $start_number; $i <= $end_number; $i++) {
  $numbers[] = $i;
}

// Create a new XLS file.
$xls = new PHPExcel();

// Add a sheet to the XLS file.
$sheet = $xls->getSheet(0);

// Set the sheet title.
$sheet->setTitle('Numbers');

// Add the numbers to the sheet.
$row = 1;
foreach ($numbers as $number) {
  $sheet->setCellValue('A' . $row, $number);
  $row++;
}

// Save the XLS file.
$xls->save('numbers.xls');

?>