Run PHP and MySQL in Docker

.
├── docker-compose.yml
├── Dockerfile
├── .env.example
├── README.md
└── src/
    └── index.php

version: '3.8'
services:
  app:
    build: .
    container_name: php_app
    ports:
      - "8080:80"
    volumes:
      - ./src:/var/www/html
    depends_on:
      db:
        condition: service_healthy
    env_file:
      - .env
    networks:
      - app_network

  db:
    image: mysql:8.0
    container_name: php_db
    environment:
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
      MYSQL_DATABASE: ${DB_DATABASE}
      MYSQL_USER: ${DB_USERNAME}
      MYSQL_PASSWORD: ${DB_PASSWORD}
    ports:
      - "3306:3306"
    volumes:
      - mysql_data:/var/lib/mysql
    env_file:
      - .env
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "-p${DB_ROOT_PASSWORD}"]
      interval: 5s
      timeout: 10s
      retries: 10
    networks:
      - app_network

  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    depends_on:
      db:
        condition: service_healthy
    ports:
      - 8081:80
    environment:
      PMA_HOST: db
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
      PMA_ARBITRARY: ${PMA_ARBITRARY}
    env_file:
      - .env
    networks:
      - app_network

volumes:
  mysql_data:

networks:
  app_network:
    driver: bridge

FROM php:8.2-apache
RUN docker-php-ext-install pdo pdo_mysql mysqli
RUN a2enmod rewrite

<?php
$wait = 30;
$db_host = 'db';
$db_name = getenv('DB_DATABASE');
$db_user = getenv('DB_USERNAME');
$db_pass = getenv('DB_PASSWORD');

$start = time();
$connected = false;

while (time() - $start < $wait && !$connected) {
    try {
        $pdo = new PDO(
            "mysql:host=$db_host;dbname=$db_name",
            $db_user,
            $db_pass,
            [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]
        );
        $connected = true;
        echo "<h2>Database connection successful!</h2>";
        $stmt = $pdo->query("SELECT VERSION()");
        echo "<p>MySQL version: " . $stmt->fetchColumn() . "</p>";
    } catch (PDOException $e) {
        if (time() - $start >= $wait) {
            echo "<h2>Connection failed after $wait seconds</h2>";
            echo "<p>" . $e->getMessage() . "</p>";
        }
        sleep(2);
    }
}

DB_ROOT_PASSWORD=rootpassword
DB_DATABASE=myapp
DB_USERNAME=myuser
DB_PASSWORD=mypassword

PMA_ARBITRARY=1

# Start everything
docker-compose up -d

# Check if running
docker-compose ps

# Stop everything
docker-compose down