18:03:07 Write to Excel2007 format<br />18:03:07 File written to 33chartcreate-column.xlsx<br />18:03:07 Peak memory usage: 2 MB<br />18:03:07 Done writing file<br />File has been created in /home/fasttech/gymbrain.fasttechsoft.com/vendor/phpoffice/phpexcel/Examples<br />