example.php

<?php
include_once("xlsxwriter.class.php");
ini_set('display_errors', 0);
ini_set('log_errors', 1);
error_reporting(E_ALL & ~E_NOTICE);

$filename = "example.xlsx";
header('Content-disposition: attachment; filename="'.XLSXWriter::sanitize_filename($filename).'"');
header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
header('Content-Transfer-Encoding: binary');
header('Cache-Control: must-revalidate');
header('Pragma: public');

$rows = array(
    array('2003','1','-50.5','2010-01-01 23:00:00','2012-12-31 23:00:00'),
    array('2003','=B1', '23.5','2010-01-01 00:00:00','2012-12-31 00:00:00'),
);

$writer = new XLSXWriter();
$writer->setAuthor('Some Author'); 
foreach($rows as $row)
	$writer->writeSheetRow('Sheet1', $row);
$writer->writeToStdOut();
//$writer->writeToFile('example.xlsx');
//echo $writer->writeToString();
exit(0);