ScriptsApr 12, 2026·1 min read

Phoenix Framework — Productive Web Framework for Elixir

Phoenix is a web framework for Elixir that provides peace of mind from prototype to production. Channels for real-time communication, LiveView for server-rendered reactive UI, and the fault-tolerance of the BEAM VM. Built for apps that need to scale.

SC
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Quick Use

Use it first, then decide how deep to go

This block should tell both the user and the agent what to copy, install, and apply first.

mix archive.install hex phx_new
mix phx.new my_app --database postgres
cd my_app
mix setup
mix phx.server
# Visit http://localhost:4000
# lib/my_app_web/router.ex
scope "/api", MyAppWeb do
  pipe_through :api
  resources "/assets", AssetController, only: [:index, :create]
end

# lib/my_app_web/controllers/asset_controller.ex
defmodule MyAppWeb.AssetController do
  use MyAppWeb, :controller

  def index(conn, _params) do
    assets = Repo.all(Asset)
    json(conn, %{assets: assets})
  end
end
Intro

Phoenix is the premier web framework for Elixir, created by Chris McCord. It provides peace of mind from prototype to production: Channels for real-time communication, LiveView for server-rendered reactive UIs (no JavaScript needed), and the fault-tolerance of the BEAM virtual machine. Phoenix consistently handles millions of concurrent WebSocket connections per server.

What Phoenix Does

  • MVC — controllers, views, templates
  • Channels — real-time WebSocket communication
  • LiveView — server-rendered reactive UI (no JS framework needed)
  • Ecto — database query DSL and migrations
  • PubSub — distributed pub/sub
  • Presence — track connected users
  • Telemetry — instrumentation hooks
  • mix phx.gen — generators for context, schema, HTML, JSON

Comparison

Framework Concurrency Real-time
Phoenix BEAM processes Channels + LiveView
Rails Threads ActionCable
Django WSGI + Channels Django Channels
Next.js Node.js WebSocket via lib

常见问题 FAQ

Q: LiveView 能替代 React？ A: 对中高交互性应用可以。LiveView 通过 WebSocket 推送 HTML diff 到浏览器，延迟在 50ms 以内感知很好。超复杂前端交互还是建议 React/Vue + Phoenix API。

来源与致谢 Sources

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