19:51:33 Write to Excel2007 format<br />19:51:33 File written to 33chartcreate-bar-stacked.xlsx<br />19:51:33 Peak memory usage: 4 MB<br />19:51:33 Done writing file<br />File has been created in /var/www/customs_yiao/vendor/phpoffice/phpexcel/Examples<br />