08:23:08 Write to Excel2007 format<br />08:23:08 File written to 33chartcreate-bar-stacked.xlsx<br />08:23:08 Peak memory usage: 6 MB<br />08:23:08 Done writing file<br />File has been created in /var/www/html/add/jiamei/laravel/vendor/phpoffice/phpexcel/Examples<br />