20:42:37 Write to Excel2007 format<br />20:42:37 File written to 33chartcreate-bar-stacked.xlsx<br />20:42:37 Peak memory usage: 6 MB<br />20:42:37 Done writing file<br />File has been created in /var/www/customs_yiao/vendor/phpoffice/phpexcel/Examples<br />