01:03:05 Create new PHPExcel object<br />01:03:05 Add some data and formulas<br />01:03:05 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 />01:03:05 Write to Excel2007 format<br />01:03:05 File written to 13calculationCyclicFormulae.xlsx<br />Call time to write Workbook was 0.0025 seconds<br />01:03:05 Current memory usage: 2 MB<br />01:03:05 Peak memory usage: 2 MB<br />01:03:05 Done writing file<br />File has been created in /var/www/billing.andrewpeng.net/vendor/turbo124/phpexcel/Examples<br />