08:21:19 Write to Excel2007 format<br />08:21:19 File written to 33chartcreate-bar-stacked.xlsx<br />08:21:19 Peak memory usage: 4 MB<br />08:21:19 Done writing file<br />File has been created in /var/www/html/add/qilan/laravel/vendor/phpoffice/phpexcel/Examples<br />