nierdz

Flush OPcache
<ul>
<li>creates a button in admin bar to flush OPcache</li>
<li>flush only files in WordPress absolute path</li>
<li>individual or bulk file invalidation</li>
<li>support both memory and file caching</li>
<li>support multisite</li>
</ul>
OPcache Statistics
<ul>
<li>memory, hits, strings and keys statistics</li>
<li>directives, functions and general informations</li>
<li>list all files</li>
<li>fully responsive</li>
</ul>
WP CLI ready
<ul>
<li>add flush-opcache command to flush cache with cli: <code>wp flush-opcache flush</code></li>
<li>don’t forget to add <code>opcache.enable_cli=1</code> to your PHP configuration</li>
</ul>
There are three tabs in admin page under Tools:
<ul>
<li>General settings: plugin settings</li>
<li>Statistics: responsive dashboard about OPcache statistics</li>
<li>Cached files: list of cached files with the possibility of invalidating them</li>
</ul>

WP OPcache

works great

Bast OPCache Manager for WordPress

Manage OPcache inside your WordPress admin dashboard.

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.

WP OPcache vs Purge Varnish Cache