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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.

Kailey (trepmal)

Shaun Scovil

It was brought to my attention shortly after releasing this plugin that WordPress automatically flushes 
rewrite rules when you visit WP-Admin > Settings > Permalinks. Ingenious, right? So don’t bother installing it, 
but feel free to check out the code if you are looking for an example of how to:
<ol>
<li>Use the WordPress Settings API to add an option to an existing Settings page;</li>
<li>Use the WordPress AJAX API in conjunction with your plugin options;</li>
<li>Over-engineer a solution to a problem that has already been solved.</li>
</ol>
Enjoy! 🙂

Rewrite Flush Button

Adds a "Flush Rewrite Rules" button to WP-Admin > Settings > Permalinks.

WP OPcache vs Rewrite Flush Button