23:54:24 Create new PHPExcel object
23:54:24 Set document properties
23:54:24 Add some data
23:54:24 Sum of Range #1 is 23
23:54:24 Sum of Range #2 is 33
23:54:24 Sum of both Ranges is 56
23:54:24 Minimum value in either Range is 3
23:54:24 Maximum value in either Range is 17
23:54:24 Average value of both Ranges is 9.3333333333333
23:54:24 Rename worksheet
23:54:24 Write to Excel2007 format

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