'Phpspreadsheet: how i can use the function excel in php

how i can use the function excel in php with phpspreadsheet? For example: the function SUM. Because i try with:

$spreadsheet->getActiveSheet()->setCellValue('E'.$row.'', '=Somma(E4:E'.$row_1.')');

But this doesn't work

phpexcelspreadsheetphpspreadsheetphpoffice-phpspreadsheet


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