23:22:53 Create new PHPExcel object
23:22:53 Set document properties
23:22:53 Add some data
23:22:53 Sum of Range #1 is 23
23:22:53 Sum of Range #2 is 33
23:22:53 Sum of both Ranges is 56
23:22:53 Minimum value in either Range is 3
23:22:53 Maximum value in either Range is 17
23:22:53 Average value of both Ranges is 9.3333333333333
23:22:53 Rename worksheet
23:22:53 Write to Excel2007 format

Fatal error: Uncaught exception 'PHPExcel_Writer_Exception' with message 'Could not close zip file /var/www/html/PHPExcel/Examples/03formulas.xlsx.' in /var/www/html/PHPExcel/Classes/PHPExcel/Writer/Excel2007.php:389 Stack trace: #0 /var/www/html/PHPExcel/Examples/03formulas.php(119): PHPExcel_Writer_Excel2007->save('/var/www/html/P...') #1 {main} thrown in /var/www/html/PHPExcel/Classes/PHPExcel/Writer/Excel2007.php on line 389