<?php
require 'vendor/autoload.php';

namespace PhpOffice\PhpSpreadsheet;

use PhpOffice\PhpSpreadsheet\Reader\IReader;
use PhpOffice\PhpSpreadsheet\Shared\File;
use PhpOffice\PhpSpreadsheet\Writer\IWriter;

/**
 * Factory to create readers and writers easily.
 *
 * It is not required to use this class, but it should make it easier to read and write files.
 * Especially for reading files with an unknown format.
 */
abstract class IOFactory
{
    public const READER_XLSX = 'Xlsx';
    public const READER_XLS = 'Xls';
    public const READER_XML = 'Xml';
    public const READER_ODS = 'Ods';
    public const READER_SYLK = 'Slk';
    public const READER_SLK = 'Slk';
    public const READER_GNUMERIC = 'Gnumeric';
    public const READER_HTML = 'Html';
    public const READER_CSV = 'Csv';

    public const WRITER_XLSX = 'Xlsx';
    public const WRITER_XLS = 'Xls';
    public const WRITER_ODS = 'Ods';
    public const WRITER_CSV = 'Csv';
    public const WRITER_HTML = 'Html';

    /** @var string[] */
    private static $readers = [
        self::READER_XLSX => Reader\Xlsx::class,
        self::READER_XLS => Reader\Xls::class,
        self::READER_XML => Reader\Xml::class,
        self::READER_ODS => Reader\Ods::class,
        self::READER_SLK => Reader\Slk::class,
        self::READER_GNUMERIC => Reader\Gnumeric::class,
        self::READER_HTML => Reader\Html::class,
        self::READER_CSV => Reader\Csv::class,
    ];

    public static function createReader(string $readerType): IReader
    {
        if (!isset(self::$readers[$readerType])) {
            throw new Reader\Exception("No reader found for type $readerType");
        }

        // Instantiate reader
        /** @var IReader */
        $className = self::$readers[$readerType];

        return new $className();
    }
}
$object = new IOFactory();
$spreadsheet = $object::createReader('Xlsx')->load('1.xlsx');
echo "success";