19:03:10 Write to Excel2007 format<br />19:03:10 File written to 33chartcreate-column.xlsx<br />19:03:10 Peak memory usage: 2 MB<br />19:03:10 Done writing file<br />File has been created in /home/hycmvsgn/heal.co.ke/invoices/vendor/phpoffice/phpexcel/Examples<br />