18:54:03 Create new PHPExcel object<br />18:54:03 Add some data and formulas<br />18:54:03 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 />18:54:03 Write to Excel2007 format<br />18:54:03 File written to 13calculationCyclicFormulae.xlsx<br />Call time to write Workbook was 0.0022 seconds<br />18:54:03 Current memory usage: 2 MB<br />18:54:03 Peak memory usage: 2 MB<br />18:54:03 Done writing file<br />File has been created in /var/www/php7.3/fed/vendor/phpoffice/phpexcel/Examples<br />