Ruby feature flags installation

Add this to your Gemfile:

Terminal

gem "posthog-ruby"

In your app, set your API key before making any calls. If setting a custom host, make sure to include the protocol (e.g. https://).

Ruby
require 'posthog'

posthog = PostHog::Client.new({
  api_key: "<ph_project_api_key>",
  host: "https://us.i.posthog.com",
  on_error: Proc.new { |status, msg| print msg }
})

You can find your project API key and instance address in the project settings page in PostHog.

Next steps

Resource	Description
Adding feature flag code	How to check flags in your code for all platforms
Framework-specific guides	Setup guides for React Native, Next.js, Flutter, and other frameworks
How to do a phased rollout	Gradually roll out features to minimize risk
More tutorials	Other real-world examples and use cases

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