Can't work $sheetData->toArray() if the .xlsx file sheet contains SWITCH()

[azuma560]

This is:

- [x] a bug report
- [ ] a feature request
- [ ] **not** a usage question (ask them on https://stackoverflow.com/questions/tagged/phpspreadsheet or https://gitter.im/PHPOffice/PhpSpreadsheet)

What is the expected behavior?

You can read sheetData by this.

    public function getSheetData($sheetName)
    {
        $reader = new \PhpOffice\PhpSpreadsheet\Reader\Xlsx();
        $spreadsheet = $reader->load("/var/www/storage/app/upload_file.xlsx");
        $sheetData = $spreadsheet->getSheetByName($sheetName)->toArray();
         return $sheetData;
    }

What is the current behavior?

ErrorException (E_ERROR)
sheet!A2 -> Formula Error: Unexpected

What are the steps to reproduce?

A2
=SWITCH(B2,0,"ja",1,"en",2,"cs",3,"ko",4,"vi")
B2
=2

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

<?php
namespace App\Http\Controllers;

class ReadController
{
    private $spreadsheet = array();

    public function __construct()
    {
        $this->read();
    }

    private function read()
    {
        $reader = new \PhpOffice\PhpSpreadsheet\Reader\Xlsx();
        $this->spreadsheet = $reader->load("/var/www/storage/app/upload_file.xlsx");
    }

    public function getSheetData($sheetName)
    {
        //error at this code
        $sheetData = $this->spreadsheet->getSheetByName($sheetName)->toArray();
        return $sheetData;
    }

Which versions of PhpSpreadsheet and PHP are affected?

PhpSpreadsheet - latest
PHP - 7.2
Laravel - 5.7

[MarkBaker]

PR merged into master