15:35:27 Write to Excel2007 format<br />15:35:27 File written to 33chartcreate-bar-stacked.xlsx<br />15:35:27 Peak memory usage: 1.75 MB<br />15:35:27 Done writing file<br />File has been created in /var/www/yii2/vendor/phpoffice/phpexcel/Examples<br />