Dockerize 您的 PHP 和 MySQL 应用程序：多容器应用程序分步指南

project/│├── php-app/│   ├── dockerfile│   └── index.php│└── docker-compose.yml

version: '3.8'services:  php-app:    build: ./php-app  # builds the php app docker image from the ./php-app directory    ports:      - "8080:80"  # maps port 8080 on the host to port 80 in the container    depends_on:      - mysql  # ensures mysql starts before the php app  mysql:    image: mysql:8.0  # uses the official mysql image    ports:      - "3306:3306"  # maps port 3306 on the host to port 3306 in the container    environment:      mysql_root_password: root  # root password for mysql      mysql_database: mydb  # initial database to create    volumes:      - mysql-data:/var/lib/mysql  # persists mysql data in a named volumevolumes:  mysql-data:  # declares a named volume for mysql data persistence

<?php$servername = "mysql";  // service name defined in docker-compose.yml$username = "root";$password = "root";$database = "mydb";try {    // create connection    $conn = new pdo("mysql:host=$servername;dbname=$database", $username, $password);    // set pdo error mode to exception    $conn->setattribute(pdo::attr_errmode, pdo::errmode_exception);    echo "connected to mysql successfully!";} catch (pdoexception $e) {    echo "connection failed: " . $e->getmessage();}?>

# use the official php imagefrom php:8.2-apache# install pdo mysql extensionrun docker-php-ext-install pdo pdo_mysql# set the working directoryworkdir /var/www/html# copy the application codecopy index.php .# expose port 80expose 80

docker-compose up --build

Connected to MySQL successfully!