Attempted to load class "Mpdf" from namespace "Mpdf" - php

Question

I'm using PHPSpreadsheet to create Excel.
I want t generate the Excel file, then convert the Excel file in a PDF one.
So I've done the following :
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Reader\Xlsx;
use PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf;
use PhpOffice\PhpSpreadsheet\Reader\Exception;
class DevisGenerator
{
public function runDevis()
{
$spreadsheet = $this->loadexcelTemplate();
$uuid = $this->uniqidReal();
$filename = $this->writeName($spreadsheet, $uuid);
$this->convertPdf($spreadsheet, $filename);
}
public function writeName($spreadsheet, $uuid)
{
$worksheet = $spreadsheet->getActiveSheet();
$worksheet->getCell('B2')->setValue('Toto');
try {
$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
$filename = $uuid;
$writer->save($filename.'.xlsx');
}catch (Exception $e)
{
//TODO gestion erreur
}
return $filename;
}
public function convertPdf($spreadsheet, $filename)
{
$writer = new \PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf($spreadsheet);
$writer->save($filename.'.pdf');
}
But whan I run the code the following error appear :
Attempted to load class "Mpdf" from namespace "Mpdf".
Did you forget a "use" statement for "PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf"?
I did not understand this error, I have correctly insert the use statement in my code.
Any idea ?

Answer 1

I've already got a similar issue with Mpdf.
PHPSpreadsheet supports multiple Librairies to generate PDF.
I'm nut using Mpdf but Tcpdf.
I'm also not sure but you need to install them manually.
composer require tecnickcom/tcpdf
Then in your code :
$writer = new Tcpdf($spreadsheet);
And don't forget the use statement ;)
Hope this help !

Answer 2

After use statement before class, you should use only:
public function convertPdf($spreadsheet, $filename)
{
$writer = new Mpdf($spreadsheet);
$writer->save($filename.'.pdf');
}

Answer 3

Since you use the fully qualified namespace when creating the instance, the use statement is not taken into account (thus the error message).
It seems like you have added a supplementary slash at the beginning of the namespace when creating your Mpdf instance, removing it will solve your issue.
$writer = new PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf($spreadsheet);
But since you have added a use statement, you do not need to use the fully qualified namespace again, you can do
$writer = new Mpdf($spreadsheet);