15:58:08 Write to Excel2007 format<br />15:58:08 File written to 33chartcreate-column.xlsx<br />15:58:08 Peak memory usage: 4 MB<br />15:58:08 Done writing file<br />File has been created in /var/www/html/examcontroller-web/vendor/phpoffice/phpexcel/Examples<br />