15:01:04 Create new PHPExcel object<br />15:01:04 Add some data and formulas<br />15:01:04 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 />15:01:04 Write to Excel2007 format<br />15:01:04 File written to 13calculationCyclicFormulae.xlsx<br />Call time to write Workbook was 0.0357 seconds<br />15:01:04 Current memory usage: 4 MB<br />15:01:04 Peak memory usage: 4 MB<br />15:01:04 Done writing file<br />File has been created in /var/www/html/vendor/phpoffice/phpexcel/Examples<br />