17:24:56 Write to Excel2007 format<br />17:24:57 File written to 33chartcreate-multiple-charts.xlsx<br />17:24:57 Peak memory usage: 6.75 MB<br />17:24:57 Done writing file<br />File has been created in /var/www/yii2/vendor/phpoffice/phpexcel/Examples<br />