18:26:30 Write to Excel2007 format<br />18:26:30 File written to 33chartcreate-column.xlsx<br />18:26:30 Peak memory usage: 2 MB<br />18:26:30 Done writing file<br />File has been created in /home/hycmvsgn/heal.co.ke/invoices/vendor/phpoffice/phpexcel/Examples<br />