18:52:50 Write to Excel2007 format<br />18:52:50 File written to 33chartcreate-bar-stacked.xlsx<br />18:52:50 Peak memory usage: 6.5 MB<br />18:52:50 Done writing file<br />File has been created in /var/www/dolphin/vendor/phpoffice/phpexcel/Examples<br />