Convert Xls to PDF Class "Mpdf\Mpdf" not found at save writer

[mametNg]

This is:

- [*] 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?

What is the current behavior?

What are the steps to reproduce?

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

use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf;
use Controller\Controller;
class v3 extends Controller
{
    private static $excel_folder = "assets/uploads/pdf/";

    function __construct()
    {   
        $this->config();
        $this->request = $this->helper('request');
        $this->db_users = $this->model('db_users');
        $this->db_tims = $this->model('db_tims');
        $this->request = $this->helper('request');
    }
    public function read()
    {
        $read_file = "assets/uploads/xls/sample.xls";
        $upload_file = "assets/uploads/pdf/sample123.pdf";

        $read = IOFactory::createReader("Xls");
        $spreadsheet = $read->load($read_file);

        $writer = IOFactory::createWriter($spreadsheet, 'Mpdf');
        $writer->save($upload_file);
    }
}

Output:

Fatal error: Uncaught Error: Class "Mpdf\Mpdf" not found in C:\xampp\htdocs\tims\vendor\phpExcel\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Writer\Pdf\Mpdf.php:23 
Stack trace: #0 C:\xampp\htdocs\tims\vendor\phpExcel\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Writer\Pdf\Mpdf.php(44): 
PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf->createExternalWriterInstance(Array) #1 C:\xampp\htdocs\tims\app\api\v3.php(148): 
PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf->save('assets/uploads/...') #2 C:\xampp\htdocs\tims\app\controllers\auth.php(46): v3->read(Array) #3 [internal function]:
auth->api('v3', 'read') #4 C:\xampp\htdocs\tims\routes\App.php(44): call_user_func_array(Array, Array) #5 C:\xampp\htdocs\tims\index.php(33): 
App\App->__construct(NULL, NULL, Array) #6 {main} thrown in C:\xampp\htdocs\tims\vendor\phpExcel\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Writer\Pdf\Mpdf.php on line 23

If this is an issue with reading a specific spreadsheet file, then it may be appropriate to provide a sample file that demonstrates the problem; but please keep it as small as possible, and sanitize any confidential information before uploading.

What features do you think are causing the issue

• [ ] Reader
• [*] Writer
• [ ] Styles
• [ ] Data Validations
• [ ] Formula Calculations
• [ ] Charts
• [ ] AutoFilter
• [ ] Form Elements

Does an issue affect all spreadsheet file formats? If not, which formats are affected?

Which versions of PhpSpreadsheet and PHP are affected?

[MarkBaker]

So have you installed the Mpdf library?

Docs