how to get date from excel using PHPExcel library

Question

I am trying to get Date from excel using PHPExcel. But I am not getting date, I am getting string value which is not seconds from 1970 .

Code I have tried is

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Answer 1

$cell = $excel->getActiveSheet()->getCell('B' . $i);
$InvDate= $cell->getValue();
$InvDate= PHPExcel_Shared_Date::ExcelToPHPObject($InvDate)->format('Y-m-d H:i:s');

Try this