19:20:14 Create new PHPExcel object<br />19:20:14 Set document properties<br />19:20:14 Add data<br />19:20:14 Set data validation<br />19:20:14 Write to Excel2007 format<br />19:20:14 File written to 15datavalidation.xlsx<br />Call time to write Workbook was 0.0020 seconds<br />19:20:14 Current memory usage: 1.75 MB<br />19:20:14 Peak memory usage: 1.75 MB<br />19:20:14 Done writing file<br />File has been created in /var/www/yii2/vendor/phpoffice/phpexcel/Examples<br />