08:20:37 Write to Excel2007 format<br />08:20:37 File written to 33chartcreate-column-2.xlsx<br />08:20:37 Peak memory usage: 4 MB<br />08:20:37 Done writing file<br />File has been created in /var/www/html/add/jiamei/laravel/vendor/phpoffice/phpexcel/Examples<br />