stianlik

mirgcire

This plugin hooks into the media manager and generates a thumbnail everytime a 
PDF is uploaded. Generated thumbnail is an image of the first page in the 
uploaded document and is named <code>PDFNAME-thumbnail</code>, where <code>PDFNAME</code> is replaced 
by uploaded document filename.
Generated thumbnails are equivalent to <a href="https://codex.wordpress.org/Post_Thumbnails" rel="nofollow ugc">featured 
images</a> so that common thumbnail 
functions like <code>get_post_thumbnail_id()</code> can be used for PDF attachments. See 
<a href="https://codex.wordpress.org/Post_Thumbnails" rel="nofollow ugc">Post Thumbnails</a> for information 
on how you can use thumbnails efficiently.
Integration with the javascript media API is not yet implemented, therefore, you 
may need to reload the page before you can see generated thumbnail after an 
upload.
<h4>Shortcodes</h4>
It is possible to display a thumbnail linking to an uploaded PDF using the <code>[pdf_thumbnails_link]</code> 
shortcode. The following attributes are supported:
<ul>
<li><code>id</code> – Attachment ID (required)</li>
<li><code>size</code> – <a href="https://codex.wordpress.org/Post_Thumbnails#Thumbnail_Sizes" rel="nofollow ugc">Thumbnail size</a> (optional)</li>
<li><code>title</code> – <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes#attr-title" rel="nofollow ugc">Anchor title attribute</a> (optional)</li>
<li><code>target</code> – <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#attr-target" rel="nofollow ugc">Anchor target attribute</a> (optional)</li>
<li><code>download</code> – <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#attr-download" rel="nofollow ugc">Anchor download attribute</a> (optional)</li>
</ul>
Example 1: Display link to PDF with ID = 172 using <a href="https://codex.wordpress.org/Post_Thumbnails#Thumbnail_Sizes" rel="nofollow ugc">default thumbnail size</a>
<pre><code>[pdf_thumbnails_link id="172"]
</code></pre>
Example 2: Display link to PDF with ID = 172 using thumbnail size (default 150×150)
<pre><code>[pdf_thumbnails_link id="172" size="thumbnail"]
</code></pre>
Thanks to <a href="https://wordpress.org/support/profile/mirgcire" rel="ugc">mirgcire</a> for providing the first 
version of the <code>[pdf_thumbnails_link]</code> shortcode.
<h4>Developer API</h4>
In most cases it should be sufficient to use built-in thumbnail functions from 
the WordPress API (<code>get_post_thumbnail</code> and similar). If you need to modify the 
way thumbnails are generated, you can override image generation with 
the <code>pdf_thumbnails_generate_image_blob</code> filter.
Example 1: Increase resolution for all generated PDF thumbnails
<pre><code>// $blob is the current image blob (defaults to null, can be used for chaining)
// $filename is the PDF filename
add_action('pdf_thumbnails_generate_image_blob', function ($blob, $filename) {
 $imagick = new Imagick();
 $imagick->setResolution(200,200);
 $imagick->readImage($filename);
 $imagick->setIteratorIndex(0);
 $imagick->setImageFormat('jpg');
 return $imagick->getImageBlob();
}, 10, 2);
</code></pre>
It is possible to modify generated thumbnail links using the <code>pdf_thumbnails_link_shortcode</code> 
filter. The following attributes are available:
<ul>
<li><code>$html</code> – Generated HTML code to be displayed</li>
<li><code>$attachmentId</code> – Sanitized ID of the PDF attachment</li>
<li><code>$size</code> – Sanitized thumbnail size</li>
<li><code>$atts</code> – <a href="https://codex.wordpress.org/Shortcode_API#Handling_Attributes" rel="nofollow ugc">Shortcode attributes (not sanitized)</a></li>
<li><code>$content</code> – Shortcode content (not sanitized)</li>
</ul>
Example 2: Wrap thumbnail link in figure and append caption
<pre><code>add_filter('pdf_thumbnails_link_shortcode', function ($html, $attachmentId, $size, $atts, $content) {
 return "<figure>$html <caption>Click to open image $attachmentId</caption></figure>";
}, 10, 5);
</code></pre>
<h3>TODO</h3>
Add generated image to media browser after upload.
Outline of an implementation based on the javascript media API:
<pre><code>// New uploads
wp.Uploader.queue.on('add', function (attachment) {

 if (attachment.subtype !== 'pdf') {
 return;
 }

 findThumbnailFor(attachment.ID).then(function (data) {

 // Add attachment thumbnail to browser
 var attachment = wp.media.model.Attachment.get(id)
 attachment.fetch().done(function () {
 wp.media.editor.open().state().get('library').add(generated attachment)
 });

 });
});
</code></pre>
Filter: ajax_query_attachments_args

PDF Thumbnails

The plugin does just what it says and the author is very helpful.  My only suggestion would be to add a short code that would insert a clickable thumbnail into a webpage.  Clicking on that would open the PDF in a viewer.
For example: [pdf-thumbnail id="1234" size="medium"]
... naturally this functionality would require host support for imagick.



Nice Job

Works just like it should. Can't believe this functionality isn't in the WP core. Thanks!

Excellent

This plugin generates a thumbnail everytime you upload a PDF attachment. Generated thumbnail is an image of the first page in uploaded document.

Pankaj Mondal

This plugin will remove the version information that gets appended to enqueued style and script URLs. It will also remove the Meta Generator tag in the head and in RSS feeds. Adds a bit of obfuscation to hide the WordPress version number and generator tag that many sniffers detect automatically from view source. Option available to selectively exclude any style or script file from version info removal process.
You can enable/disable each removal options from admin dashboard:
<ul>
<li>Remove WordPress Meta Generator Tag</li>
<li>Remove WPML (WordPress Multilingual Plugin) Meta Generator Tag</li>
<li>Remove Slider Revolution Meta Generator Tag</li>
<li>Remove WPBakery Page Builder Meta Generator Tag</li>
<li>Remove Easy Digital Downloads Meta Generator Tag</li>
<li>Remove Master Slider Meta Generator Tag</li>
<li>Remove LayerSlider Meta Generator Tag</li>
<li>Remove Site Kit by Google Meta Generator Tag</li>
<li>Remove Divi Theme Meta Generator Tag (By default disabled; if required enable from Settings)</li>
<li>Remove Elementor Website Builder Meta Generator Tag (By default disabled; if required enable from Settings)</li>
<li>Remove Image Placeholders Meta Generator Tag</li>
<li>Remove Performance Lab Meta Generator Tag</li>
<li>Remove Performant Translations Meta Generator Tag</li>
<li>Remove WEBP Uploads (Modern Image Formats) Meta Generator Tag</li>
<li>Remove WP Admin Footer Version & Thank You Note (By default disabled; if required enable from Settings)</li>
<li>Remove Version from Stylesheet</li>
<li>Remove Version from Script</li>
<li>Exclude files from version info removal process (by providing comma separated file names)</li>
<li>Remove Yoast SEO comments</li>
<li>Remove WP Rocket comments backlink and mention</li>
<li>Remove Google Analytics (MonsterInsights) comments</li>
<li>Remove Admin Bar WordPress Logo</li>
<li>Remove Admin Login Page Logo</li>
<li>Remove WordPress Text from Admin Login Page Title</li>
<li>Remove WordPress Text from Admin Pages’ Titles</li>
<li>Remove Admin Dashboard Help Tab</li>
</ul>
You have any suggestions to make this plugin better? Please share your thoughts in the support thread.
Dashboard > Settings > Meta Generator and Version Info Remover
This plugin is trusted since 2013.
If you like this plugin, please rate and review this plugin. If you want to support development of this plugin, please <a href="https://www.paypal.me/pankajkumarmondal" rel="nofollow ugc">Donate</a>.

Meta Generator and Version Info Remover

Cleans up meta tags and removes versions we dont need, cleaning up source code and increasing site speed. Just set it and forget it.

Works as intended

This plugin will remove the version info appended to enqueued style and script urls along with Meta Generator in the head section and in RSS feeds.

PDF Thumbnails vs Meta Generator and Version Info Remover