<?php
// include the autoloader, so we can use PhpSpreadsheet
require_once(__DIR__ . '/vendor/autoload.php');
# Create a new Xls Reader
$reader = new PhpOfficePhpSpreadsheetReaderXlsx();
// Tell the reader to only read the data. Ignore formatting etc.
$reader->setReadDataOnly(true);
// Read the spreadsheet file.
$spreadsheet = $reader->load(__DIR__ . '/path/to/file.xlsx');
$sheet = $spreadsheet->getSheet($spreadsheet->getFirstSheetIndex());
$data = $sheet->toArray();
// output the data to the console, so you can see what there is.
die(print_r($data, true));