12:08:59 Create new PHPExcel object
12:08:59 Add some data and formulas
12:08:59 Calculated data
Value of A1 [=B1]: 100
Value of B1 [=A1+1]: 100
Value of A2 [=B2+1]: 100
Value of B2 [=A2]: 99
12:08:59 Write to Excel2007 format
12:08:59 File written to 13calculationCyclicFormulae.xlsx
Call time to write Workbook was 0.0232 seconds
12:08:59 Current memory usage: 4 MB
12:08:59 Peak memory usage: 4 MB
12:08:59 Done writing file
File has been created in /var/www/html/petroerp3/vendor/phpoffice/phpexcel/Examples