Razvan Stanga

Complete WordPress Varnish Cache 3.x/4.x/5.x and Nginx Proxy Cache integration.
This plugin handles all integration with Varnish Cache and Nginx Proxy Cache. It was designed for high traffic websites.
Main features
<ul>
<li>admin interface, see screenshots</li>
<li>console for manual purges, supports regular expressions so you can purge an entire folder or just a single file</li>
<li>supports every type of Varnish Cache implementation, see screenshots for examples</li>
<li>unlimited number of Varnish Cache servers</li>
<li>use of custom headers when communicating with Varnish Cache does not interfere with other caching plugins, cloudflare, etc</li>
<li>Varnish Cache configuration generator</li>
<li>purge key method so you don’t need to setup ACLs</li>
<li>debugging</li>
<li>actively maintained</li>
</ul>
You can control the following from the Varnish Caching admin panel :
<ul>
<li>Enable/Disable caching</li>
<li>Homepage cache TTL</li>
<li>Cache TTL (for every other page)</li>
<li>IPs/Hosts to clear cache to support every type of Varnish Cache implementation</li>
<li>Override default TTL in posts/pages</li>
<li>Purge key based PURGE</li>
<li>Logged in cookie</li>
<li>Debugging option</li>
<li>console for precise manual purges</li>
</ul>
This plugin also auto purges Varnish Cache / Nginx Proxy Cache when your site is modified.
Varnish Caching sends a PURGE request to Varnish Cache / Nginx Proxy Cache when a page or post is modified. This occurs when editing, publishing, commenting or deleting an item, and when changing themes. 
Not all pages are purged every time, depending on your Varnish / Nginx Proxy Cache configuration. When a post, page, or custom post type is edited, or a new comment is added, only the following pages will purge:
<ul>
<li>The front page</li>
<li>The post/page edited</li>
<li>Any categories or tags associated with the page</li>
</ul>
<a href="https://www.varnish-cache.org/" rel="nofollow ugc">Varnish Cache</a> / <a href="https://www.nginx.com/blog/nginx-caching-guide/" rel="nofollow ugc">Nginx Proxy Cache</a> is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin does not install Varnish/Nginx for you, nor does it configure Varnish/Nginx for WordPress. It’s expected you already did that on your own using the provided config files.
Inspired from the following :
<ul>
<li>https://wordpress.org/plugins/varnish-http-purge/</li>
<li>https://github.com/dreamhost/varnish-vcl-collection/</li>
</ul>

Varnish/Nginx Proxy Caching

Wordpress Varnish Cache 3.x/4.x/5.x and Nginx Proxy Cache integration

Dsingh

Purge Varnish Cache provides integration between your WordPress site and multiple Varnish Cache servers. Purge Varnish Cache sends a PURGE request to the URL of a page or post every time based on configured actions and trigger by site administrator. Varnish is a web application accelerator also known as a caching HTTP reverse proxy.
Features: 
* Support on all varnish versions of 3.x, 4.x, 5.x and 6.x 
* One time configuration. 
* admin-socket integration and Varnish admin interface for status. 
* unlimited number of Varnish Cache servers. 
* Custom URLs purge. 
* User interface for manual purge. 
* Single click entire cache purge. 
* Debugging. 
* Actively maintained.
Requirements: Apache sockets module/extention should be enabled.
Purpose: The main purpose of developing this plugin is to deliver updated copy of content to end user without any delay.
Enhancement Request: For any further enhancement, please mail me at <a href="mailto:dev.firoza@gmail.com" rel="nofollow ugc">dev.firoza@gmail.com</a>

Purge Varnish Cache

I try so many plugins available on wordpress.org but it have the following unique features  in respect of available other plugins on wordpress.org.


    	admin-socket integration and Varnish admin interface for status etc.

    	Unlimited number of Varnish Cache servers

    	Configurable actions upon events that will expire URLs from varnish cache like reverse proxy caches.

    	Purge multiple URLs manually from Varnish cache.

        Debugging

Purge Varnish Cache automatically based on configurable actions upon events or s

Clean clear VARNISH cache automatically when content on your site is created or modified, also allow you to purge VARNISH cache manually.

Varnish/Nginx Proxy Caching vs Purge Varnish Cache