How to display a thumbnail of a pdf file on a website?

Question

PHP

There are 10 pdf files. Each contains several pages.
The site has a page with links to download and view these pdf files.
I want to display thumbnails of the first pages of PDF files next to it.
Tried Imagick, but something is still wrong.

$myurl = realpath('file.pdf[0]');
  $image = new Imagick($myurl);
  $image->setResolution( 300, 300 );
  $image->setImageFormat( "png" );
  $image->writeImage('newfilename.png');

OpenServer 5.1.1. outputs the following message:
( ! ) Fatal error: Uncaught exception 'ImagickException' with message 'Can not process empty Imagick object' in D:\OpenServer\domains\test.local\index.php on line 18
( ! ) ImagickException: Can not process empty Imagick object in D:\OpenServer\domains\test.local\index.php on line 18

Answer 1

In general, it would be better for you to walk along the crown to do a preview in advance
. And in your realpath - is the path recognized correctly?

Answer 2

Do you have ghostscript installed? Without it, IM cannot read PostScript and PDF as its special case.