WP OPcache

What is WP OPcache?

WP OPcache is a focused performance utility that gives you direct control over PHP OPcache from inside your WordPress admin. Developed by nierdz, this plugin has been available for 9 years and currently serves 10K+ active installs. It holds a 4.8/5 rating from 20 reviews, with 95% of users awarding five stars. The plugin works as a dedicated wordpress cache plugin for OPcache management, rather than a full-page caching solution. Version 4.2.3 was last updated on Feb 27, 2025.

Unlike general cache plugins that handle database queries or page HTML, WP OPcache targets PHP bytecode caching specifically. It lets you flush cached scripts, view real-time statistics, and invalidate individual files. This tool is essential for sites running on PHP 8.1+ and WordPress 6.0 or higher.

Key Features of WP OPcache

• Admin Bar Flush Button – A one-click button in the WordPress admin bar to clear the entire OPcache.
• Path-Specific Cache Flushing – Flushes only files within the WordPress absolute path, leaving other cached scripts untouched.
• Individual or Bulk File Invalidation – Select single files or multiple cached scripts to invalidate them from the cache.
• Memory and File Cache Support – Works with both OPcache storage backends, covering all standard PHP configurations.
• Full Multisite Support – Functions across all sites in a WordPress Multisite network, making it a strong best cache plugin for wordpress multisite candidate.
• OPcache Statistics Dashboard – Displays memory usage, hit rates, string and key counts, plus PHP directives and general information.
• Cached Files List with Invalidation – Browse all cached files in a sortable table and invalidate them directly from the admin interface.
• WP-CLI Integration – Run wp flush-opcache flush from the command line to clear cache without visiting the admin area.

Who Should Use WP OPcache?

This plugin is built for developers and site administrators who manage PHP environments directly. If you run a high-traffic WordPress site or a multisite network, OPcache bloat can degrade performance over time. WP OPcache gives you surgical control over which cached scripts stay and which get cleared. With 10K+ active installs, it is a trusted tool for those who know exactly what OPcache does. Beginners who just want to clear cache without technical details will find the admin bar button straightforward, but the statistics tabs require some PHP knowledge to interpret.

The ideal user runs custom code, plugin development environments, or staging sites where code changes happen frequently. For those asking how to clear opcache in wordpress, this plugin provides the answer in one click. It also answers the question clear opcache wordpress admin by placing the flush action directly in the toolbar. The multisite compatibility makes it especially valuable for agencies managing dozens of sites under one network.

Installation & Setup

Install WP OPcache like any other plugin from the WordPress repository. Activate it, and a flush button appears in the admin bar immediately. No configuration is required to start clearing cache. For WP-CLI users, add opcache.enable_cli=1 to your PHP configuration before issuing commands. The plugin adds a Tools menu item with three tabs: General settings, Statistics, and Cached files. The entire setup takes under two minutes.

Support & Community

The plugin maintains a strong reputation with 95% five-star ratings and only 5% one-star ratings. In the last two months, the support forum recorded open threads. The developer has maintained the plugin for 9 years, with the latest update on Feb 27, 2025. The rating distribution suggests consistent user satisfaction, particularly among technical users who need reliable OPcache management. The small support thread count indicates either low usage or few issues, which aligns with the plugin's simple feature set.