<?php

use PhpOffice\PhpSpreadsheet\IOFactory;

require __DIR__ . '/../Header.php';

$inputFileType = 'Xlsx';
$inputFileName = __DIR__ . '/sampleData/example1.xlsx';

/*  Create a new Reader of the type defined in $inputFileType  * */
$reader = IOFactory::createReader($inputFileType);
/*  Load $inputFileName to a PhpSpreadsheet Object  * */
$spreadsheet = $reader->load($inputFileName);

/*  Read an array list of any custom properties for this document  * */
$customPropertyList = $spreadsheet->getProperties()->getCustomProperties();

foreach ($customPropertyList as $customPropertyName) {
    $helper->log($customPropertyName);
}