21:20:35 Write to Excel2007 format<br />21:20:35 File written to 33chartcreate-column-2.xlsx<br />21:20:35 Peak memory usage: 1.75 MB<br />21:20:35 Done writing file<br />File has been created in /var/www/yii2/vendor/phpoffice/phpexcel/Examples<br />