21:36:43 Write to Excel2007 format<br />21:36:43 File written to 33chartcreate-column-2.xlsx<br />21:36:43 Peak memory usage: 4 MB<br />21:36:43 Done writing file<br />File has been created in /var/www/customs_rongma/vendor/phpoffice/phpexcel/Examples<br />