07:25:00 Create new PHPExcel object
07:25:00 Set document properties
07:25:00 Add some data
07:25:00 Sum of Range #1 is 23
07:25:00 Sum of Range #2 is 33
07:25:00 Sum of both Ranges is 56
07:25:00 Minimum value in either Range is 3
07:25:00 Maximum value in either Range is 17
07:25:00 Average value of both Ranges is 9.3333333333333
07:25:00 Rename worksheet
07:25:00 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