Import page from external PDF file can't display properly - php

Question

The PDF file have a large width than normal.
$pagecount = $mpdf->SetSourceFile($pdfurl);
for($x=0;$x<$pagecount;$x++){
$tplId = $mpdf->ImportPage(($x+1));
$mpdf->UseTemplate($tplId);
$mpdf->AddPage();
}
Most PDF is displayed well, but with large width, it only display a part of it.

Answer 1

There are several issues in your code:
You call UseTemplate() before you have added a page.
The AddPage() method adds a page in the default page size, which was defined in the constructor.
So you have to change your script to:
$pageCount = $mpdf->SetSourceFile($pdfurl);
for($pageNo = 1; $pageNo <= $pageCount ; $pageNo++){
$tplId = $mpdf->ImportPage($pageNo);
$size = $mpdf->GetTemplateSize($pageNo);
$mpdf->AddPageByArray([
'orientation' => $size['w'] > $size['h'] ? 'L' : 'P',
'newformat' => [$size['w'], $size['h']]
]);
$mpdf->UseTemplate($tplId);
}

Answer 2

Thanks #Jan.Your code not work perfectly for me.But point me the right direction.
for($pageNo = 1; $pageNo <= $pageCount ; $pageNo++){
$tplId = $mpdf->ImportPage($pageNo);
$size = $mpdf->GetTemplateSize($tplId);
$w=210;
if($size['w'] > $size['h']){
$w=299;
}
$mpdf->AddPageByArray([
'orientation' => $size['w'] > $size['h'] ? 'L' : 'P'
]);
$mpdf->UseTemplate($tplId,0,0,$w);
}
But my solution got a problem.The landscape mode will scale the PDF size a little small.