19:44:48 Write to Excel2007 format<br />19:44:48 File written to 33chartcreate-column-2.xlsx<br />19:44:48 Peak memory usage: 2 MB<br />19:44:48 Done writing file<br />File has been created in /home/hsinlung/public_html/core/vendor/phpoffice/phpexcel/Examples<br />