02:32:08 Create new PHPExcel object<br />02:32:08 Add some data and formulas<br />02:32:08 Calculated data<br />Value of A1 [=B1]: 100<br />Value of B1 [=A1+1]: 100<br />Value of A2 [=B2+1]: 100<br />Value of B2 [=A2]: 99<br />02:32:08 Write to Excel2007 format<br />02:32:08 File written to 13calculationCyclicFormulae.xlsx<br />Call time to write Workbook was 0.0068 seconds<br />02:32:08 Current memory usage: 2 MB<br />02:32:08 Peak memory usage: 2 MB<br />02:32:08 Done writing file<br />File has been created in /var/www/html/petroerp3/vendor/phpoffice/phpexcel/Examples<br />