By default, attachments do not have a version query parameter, like, for example JavaScript files have. This plugins adds version numbers to the query strings of attachments.
Version numbers in query strings are useful for caching. If an attachment changes, its version number and, therefore, its URL changes. This allows for the attachment to be cached for an extended period of time or indefintely, for example, with the directive “immutable” of the Cache-Control header.

Attachment URL Version

Adds the version number of attachments to their URL.

Florent Maillefaud

This plugin adds conditional logic to <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">[Contact Form 7]</a>.
Send the PDF for Contact Form plugin will allow you to recover the data yourself via your form to insert them into a PDF built and prepared by you.
This plugin requires the installation and activation of the plugin Contact Form 7.
<a href="https://demo.restezconnectes.fr/send-pdf-for-contact-form-7/" rel="nofollow ugc">DEMO HERE</a> 
<a href="https://restezconnectes.fr/tutoriel-wordpress-lextension-send-pdf-for-contact-form-7/" rel="nofollow ugc">[Tutorial Here]</a>
Translations: <a href="https://translate.wordpress.org/projects/wp-plugins/send-pdf-for-contact-form-7/" rel="nofollow ugc">Here</a>
<h3>Contribute</h3>
You can contribute with code, issues and ideas at the <a href="https://github.com/Florent73/send-pdf-for-contact-form-7" rel="nofollow ugc">GitHub repository</a>.
If you like it, a review is appreciated 🙂

Send PDF for Contact Form 7

Create, customize and send PDF attachments with Contact Form 7 form

Attachment URL Version vs Send PDF for Contact Form 7