<?php
set_include_path( get_include_path().PATH_SEPARATOR."..");
include_once("xlsxwriter.class.php");

$chars = 'abcdefgh';

$writer = new XLSXWriter();
$writer->writeSheetHeader('Sheet1', array('c1'=>'string','c2'=>'integer','c3'=>'integer','c4'=>'integer','c5'=>'integer'), ['freeze_rows'=>1, 'freeze_columns'=>1] );
for($i=0; $i<250; $i++)
{
    $writer->writeSheetRow('Sheet1', array(
        str_shuffle($chars),
        rand()%10000,
        rand()%10000,
        rand()%10000,
        rand()%10000
    ));
}
$writer->writeToFile('xlsx-freeze-rows-columns.xlsx');
echo '#'.floor((memory_get_peak_usage())/1024/1024)."MB"."\n";