Title: Myrk Feature Flags Author: Bjorn Holine Published: September 3, 2026 Last modified: September 3, 2026 --- Search plugins ![](https://ps.w.org/myrk-feature-flags/assets/banner-772x250.png?rev=3678903) ![](https://ps.w.org/myrk-feature-flags/assets/icon-256x256.png?rev=3678903) # Myrk Feature Flags By [Bjorn Holine](https://profiles.wordpress.org/bjorn2404/) [Download](https://downloads.wordpress.org/plugin/myrk-feature-flags.1.0.0.zip) * [Details](https://wordpress.org/plugins/myrk-feature-flags/#description) * [Reviews](https://wordpress.org/plugins/myrk-feature-flags/#reviews) * [Installation](https://wordpress.org/plugins/myrk-feature-flags/#installation) * [Development](https://wordpress.org/plugins/myrk-feature-flags/#developers) [Support](https://wordpress.org/support/plugin/myrk-feature-flags/) ## Description WordPress feature flags and feature toggles built for development teams shipping on complex sites. No external feature flag service, no Redis, no third-party account— all state lives in your WordPress database. **Define flags in code. Control state from the admin.** Register feature flags in your plugin or theme — version controlled and peer reviewable. Enable, disable, and roll out per environment without code changes or redeploys. Designed for teams practicing trunk-based development and continuous delivery — merge to main confidently and control what users see from the database. #### Coming from a SaaS feature flag service? Myrk works differently: your codebase is the source of truth. Flags are declared with `Myrk::register()` in PHP and committed to your repo — they appear in the admin automatically. The admin controls state only; it does not create flags. This keeps your flag inventory version controlled and peer reviewed, the same as everything else in your codebase. #### Key features * **Code-registered flags** — `Myrk::register()` in PHP, reviewed in Git * **Per-environment state** — uses `wp_get_environment_type()` automatically * **Progressive rollout** — deterministic percentage rollout, no cookies required * **Targeting rules** — role, capability, user ID, email domain * **Circuit breaker** — `Myrk::attempt()` wraps risky code with automatic fallback * **Stale flag detection** — visual badge for feature toggles inactive 90+ days * **REST API** — full CRUD, powers admin UI and CI/CD pipeline automation * **WP-CLI** — complete feature flag management from the command line * **No external dependencies** — no Redis, no Node, no third-party service ### Source Code The compiled JavaScript in `build/` is generated from source files in `assets/js/` using `@wordpress/scripts` (webpack). Both the source and compiled files are included in the plugin zip. To rebuild the compiled assets, install Node.js dependencies with `pnpm install` and run `pnpm build`. ## Screenshots [⌊Flags list — group badges, enabled/disabled status pills, rollout percentage bars, target counts, and stale badges across a realistic set of flags.⌉⌊Flags list — group badges, enabled/disabled status pills, rollout percentage bars, target counts, and stale badges across a realistic set of flags.⌉[ Flags list — group badges, enabled/disabled status pills, rollout percentage bars, target counts, and stale badges across a realistic set of flags. [⌊Groups screen — feature-area groups and sprint groups each showing flag counts and optional external reference links.⌉⌊Groups screen — feature-area groups and sprint groups each showing flag counts and optional external reference links.⌉[ Groups screen — feature-area groups and sprint groups each showing flag counts and optional external reference links. [⌊Edit flag (top) — flag definition card alongside the rollout panel (enabled toggle and percentage slider) and auto-generated PHP/JS code snippets.⌉⌊Edit flag (top)— flag definition card alongside the rollout panel (enabled toggle and percentage slider) and auto-generated PHP/JS code snippets.⌉[ Edit flag (top) — flag definition card alongside the rollout panel (enabled toggle and percentage slider) and auto-generated PHP/JS code snippets. [⌊Edit flag (bottom) — behavior settings (lifecycle, default state, rewind strategy) and a targeting rule locking the flag on for administrators.⌉⌊Edit flag (bottom)— behavior settings (lifecycle, default state, rewind strategy) and a targeting rule locking the flag on for administrators.⌉[ Edit flag (bottom) — behavior settings (lifecycle, default state, rewind strategy) and a targeting rule locking the flag on for administrators. [⌊Stale flag detection — three flags backdated past the 90-day threshold each displaying a STALE badge, demonstrating the built-in hygiene signal.⌉⌊Stale flag detection — three flags backdated past the 90-day threshold each displaying a STALE badge, demonstrating the built-in hygiene signal.⌉[ Stale flag detection — three flags backdated past the 90-day threshold each displaying a STALE badge, demonstrating the built-in hygiene signal. ## Installation 1. Upload the `myrk-feature-flags` directory to `/wp-content/plugins/`. 2. Activate the plugin in **Plugins > Installed Plugins**. 3. Navigate to **Myrk** in the admin menu. 4. Register your first flag in code: `Myrk::register( 'my_flag', [ 'label' => 'My Flag' ] );` ## FAQ ### Does Myrk require any external services? No. Myrk stores all data in your WordPress database and requires no external infrastructure. ### What PHP version is required? PHP 8.1 or higher. Myrk targets enterprise WordPress teams on modern hosting stacks. ### How does percentage rollout work? Myrk uses a deterministic CRC32 hash of the flag key and user identifier. The same user always gets the same flag state for a given percentage — no cookies required. ### Can I use Myrk for A/B testing? Yes. The percentage rollout uses deterministic hashing — the same user always sees the same variant without cookies. Pair it with your existing analytics to track outcomes. Myrk controls the split; you measure the results. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “Myrk Feature Flags” is open source software. The following people have contributed to this plugin. Contributors * [ Bjorn Holine ](https://profiles.wordpress.org/bjorn2404/) [Translate “Myrk Feature Flags” into your language.](https://translate.wordpress.org/projects/wp-plugins/myrk-feature-flags) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/myrk-feature-flags/), check out the [SVN repository](https://plugins.svn.wordpress.org/myrk-feature-flags/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/myrk-feature-flags/) by [RSS](https://plugins.trac.wordpress.org/log/myrk-feature-flags/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 1.0.0 * Initial release. ## Meta * Version **1.0.0** * Last updated **2 days ago** * Active installations **Fewer than 10** * WordPress version ** 7.0 or higher ** * Tested up to **7.1** * PHP version ** 8.1 or higher ** * Tags * [a b testing](https://wordpress.org/plugins/tags/a-b-testing/)[developer-tools](https://wordpress.org/plugins/tags/developer-tools/) [feature flags](https://wordpress.org/plugins/tags/feature-flags/) * [Advanced View](https://wordpress.org/plugins/myrk-feature-flags/advanced/) ## Ratings No reviews have been submitted yet. [Your review](https://wordpress.org/support/plugin/myrk-feature-flags/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/myrk-feature-flags/reviews/) ## Contributors * [ Bjorn Holine ](https://profiles.wordpress.org/bjorn2404/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/myrk-feature-flags/)