08:51:42 Create new PHPExcel object
08:51:42 Set document properties
08:51:42 Add some data
08:51:42 Rename worksheet
08:51:42 Clone worksheet
08:51:42 Rename cloned worksheet
08:51:42 Write to Excel2007 format

Fatal error: Uncaught Error: Class 'ZipArchive' not found in /var/www/html/API/class/PHPExcel-1.8/Classes/PHPExcel/Writer/Excel2007.php:220 Stack trace: #0 /var/www/html/API/class/PHPExcel-1.8/Examples/38cloneWorksheet.php(103): PHPExcel_Writer_Excel2007->save() #1 {main} thrown in /var/www/html/API/class/PHPExcel-1.8/Classes/PHPExcel/Writer/Excel2007.php on line 220