Generate multiple PDF files using single for loop in CodeIgniter
I was also working on similar thing,
I changed
$mpdf->Output($title.".pdf",'D');
TO
$mpdf->Output('c:/pdf/'.$title.".pdf",'F');
This create file in the location specified
Have you tried this:
$mpdf->Output($title.$i.".pdf",'D');
Instead of
$mpdf->Output($title.".pdf",'D');