Docker for PHP Developers: A Practical Guide

If you've ever spent hours compiling PHP extensions, fighting with different versions between your local machine and production, or hearing "it works on my machine," Docker is the solution you've been looking for.

Why Docker?

Docker containers package your application with all its dependencies, ensuring consistency across development, staging, and production. A PHP 8.3 container on your laptop runs the exact same code as PHP 8.3 on your server.

Getting Started

A basic PHP development setup needs three containers: PHP-FPM for running your code, Nginx or Apache as the web server, and MySQL or PostgreSQL for your database. With Docker Compose, you can define all of this in a single YAML file:

version: "3.8"
services:
  php:
    image: php:8.3-fpm
    volumes:
      - ./:/var/www/html
  nginx:
    image: nginx:alpine
    ports:
      - "80:80"
    volumes:
      - ./:/var/www/html
      - ./nginx.conf:/etc/nginx/conf.d/default.conf
  db:
    image: mysql:8.0
    environment:
      MYSQL_ROOT_PASSWORD: secret

Development Workflow

With Docker, onboarding new developers becomes trivial. Clone the repo, run docker-compose up, and you're ready to code. No manual installation of PHP, no configuring local databases, no version conflicts.

"Docker doesn't just solve deployment problems—it solves the "works on my machine" problem forever."