19:35:37 Write to Excel2007 format<br />19:35:37 File written to 33chartcreate-bar-stacked.xlsx<br />19:35:37 Peak memory usage: 6.5 MB<br />19:35:37 Done writing file<br />File has been created in /var/www/dolphin/vendor/phpoffice/phpexcel/Examples<br />