eclev91

This will quickly tell your server has all the software installed to take advantage of WordPress 4.7’s built-in PDF thumbnail generation. Some plugins may shim the functionality in other ways. This test only concerns the native WordPress functionality.
From <a href="https://sternerstuffdesign.com" rel="nofollow ugc">Sterner Stuff Design</a>.
Tests: 
* ImageMagick 
* Imagick PECL Extension 
* GhostScript 
* Your WordPress Version

PDF Thumbnails Support Test

Determine if your server is missing software for WordPress 4.7's native PDF thumbnail generator.

PDF Thumbnails Support Test vs WP Document Revisions