43 Merge workbooks

13:45:04 Load MergeBook1 from Xlsx file
13:45:04 Read Xlsx format from /opt/www/pxe/vendor/phpoffice/phpspreadsheet/samples/Basic/../templates/43mergeBook1.xlsx in 0.0377 seconds
13:45:04 Load MergeBook2 from Xlsx file
13:45:04 Read Xlsx format from /opt/www/pxe/vendor/phpoffice/phpspreadsheet/samples/Basic/../templates/43mergeBook2.xlsx in 0.0037 seconds
13:45:04 Write Xlsx format to /tmp/phpspreadsheet/43_Merge_workbooks.xlsx in 0.0063 seconds
13:45:04 Write Xls format to /tmp/phpspreadsheet/43_Merge_workbooks.xls in 0.0143 seconds
13:45:04 Peak memory usage: 2MB