19:58:03 Write to Excel2007 format<br />19:58:03 File written to 33chartcreate-column-2.xlsx<br />19:58:03 Peak memory usage: 6 MB<br />19:58:03 Done writing file<br />File has been created in /var/www/customs_rongma/vendor/phpoffice/phpexcel/Examples<br />