21:51:03 Write to Excel2007 format<br />21:51:03 File written to 33chartcreate-bar-stacked.xlsx<br />21:51:03 Peak memory usage: 2 MB<br />21:51:03 Done writing file<br />File has been created in /var/www/laravel-wms/vendor/phpoffice/phpexcel/Examples<br />