mcpField
F
feature-flags-php

feature-flags-php

github.com/posthogDevelopment7693 installsUpdated today
Repository

About feature-flags-php

A coding skill for adding PostHog feature flags to PHP applications. It provides implementation guidance and recommends server-side evaluation and boolean flags by default.

Key features

  1. 01PHP feature-flag setup guidance
  2. 02Boolean flag checks by default
  3. 03Server-side evaluation guidance
  4. 04PostHog flag management via MCP
  5. 05PHP SDK usage guidance

Use cases

  1. 01Adding feature flags to a PHP app
  2. 02Evaluating flags on the server
  3. 03Managing flags through connected PostHog MCP tools

MCP support

When a PostHog MCP server is connected, the skill recommends using its tools to create, list, update, or delete feature flags in PostHog.

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/posthog/skills --skill feature-flags-php

After installing, type/feature-flags-phpin Claude Code to confirm it loaded.

Bundled files

References and scripts installed along with SKILL.md.

references/
adding-feature-flag-code.md
best-practices.md
php.md

Details

From the project README

PostHog feature flags for PHP

This skill helps you add PostHog feature flags to PHP applications.

Reference files

  • references/php.md - Php feature flags installation - docs
  • references/adding-feature-flag-code.md - Adding feature flag code - docs
  • references/best-practices.md - Feature flag best practices - docs

Consult the documentation for API details and framework-specific patterns.

Key principles

  • Environment variables: Always use environment variables for PostHog keys. Never hardcode them.
  • Minimal changes: Add feature flag code alongside existing logic. Don't replace or restructure existing code.
  • Boolean flags first: Default to boolean flag checks unless the user specifically asks for multivariate flags.
  • Server-side when possible: Prefer server-side flag evaluation to avoid UI flicker.

PostHog MCP tools

Check if a PostHog MCP server is connected. If available, look for tools related to feature flag management (creating, listing, updating, deleting flags). Use these tools to manage flags directly in PostHog rather than requiring the user to do it manually in the dashboard.

Framework guidelines

  • Remember that source code is available in the vendor directory after composer install
  • posthog/posthog-php is the PHP SDK package name
  • Check composer.json for existing dependencies and autoload configuration before adding new files
  • The PHP SDK uses static methods (PostHog::capture, PostHog::identify) - initialize once with PostHog::init()
  • PHP SDK methods take associative arrays with 'distinctId', 'event', 'properties' keys - not positional arguments

Comments

Markdown supported