test.php

<?php
/**
 * Pfarrplaner
 *
 * @package Pfarrplaner
 * @author Christoph Fischer <chris@toph.de>
 * @copyright (c) 2020 Christoph Fischer, https://christoph-fischer.org
 * @license https://www.gnu.org/licenses/gpl-3.0.txt GPL 3.0 or later
 * @link https://github.com/potofcoffee/pfarrplaner
 * @version git: $Id$
 *
 * Sponsored by: Evangelischer Kirchenbezirk Balingen, https://www.kirchenbezirk-balingen.de
 *
 * Pfarrplaner is based on the Laravel framework (https://laravel.com).
 * This file may contain code created by Laravel's scaffolding functions.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

require_once('vendor/autoload.php');

$spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load('d:\downloads\Plan2019.xlsx');
$sheet = $spreadsheet->getActiveSheet();

for ($i = 1; $i <= 20; $i++) {
    $column = chr(64 + $i);
    $width = $sheet->getColumnDimension($column)->getWidth();
    echo "{$column}: {$width}\r\n";
}