如何用Docker配置PHP支持邮件发送 PHP容器SMTP服务配置方式

<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'vendor/autoload.php'; // 假设你使用Composer管理依赖

$mail = new PHPMailer(true); // 启用异常处理

try {
    // 服务器设置
    $mail->isSMTP(); // 设定使用SMTP
    $mail->Host = getenv('SMTP_HOST'); // 从环境变量获取SMTP主机
    $mail->SMTPAuth = true; // 启用SMTP认证
    $mail->Username = getenv('SMTP_USERNAME'); // SMTP用户名
    $mail->Password = getenv('SMTP_PASSWORD'); // SMTP密码
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS; // 启用TLS加密，推荐
    $mail->Port = getenv('SMTP_PORT'); // 通常是587，如果是SSL是465

    // 收件人
    $mail->setFrom(getenv('MAIL_FROM_ADDRESS'), getenv('MAIL_FROM_NAME'));
    $mail->addAddress('recipient@example.com', '收件人'); // 添加收件人

    // 内容
    $mail->isHTML(true); // 邮件内容为HTML
    $mail->Subject = '这是一封测试邮件';
    $mail->Body    = '你好，<b>这是一封来自Docker容器的测试邮件！</b>';
    $mail->AltBody = '你好，这是一封来自Docker容器的测试邮件！ (纯文本)';

    $mail->send();
    echo '邮件已发送';
} catch (Exception $e) {
    echo "邮件发送失败。错误信息: {$mail->ErrorInfo}";
}
?>

version: '3.8'
services:
  php-app:
    build: . # 你的PHP应用Dockerfile
    volumes:
      - ./src:/var/www/html
    environment:
      - SMTP_HOST=smtp.your-mail-provider.com
      - SMTP_PORT=587
      - SMTP_USERNAME=your-email@example.com
      - SMTP_PASSWORD=your-email-password
      - MAIL_FROM_ADDRESS=no-reply@your-domain.com
      - MAIL_FROM_NAME=Your Application
    # ... 其他配置，如连接Nginx或Apache

version: '3.8'

services:
  nginx:
    image: nginx:stable-alpine
    ports:
      - "80:80"
    volumes:
      - ./src:/var/www/html
      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf
    depends_on:
      - php-fpm
    networks:
      - app-network

  php-fpm:
    build:
      context: .
      dockerfile: Dockerfile.php
    volumes:
      - ./src:/var/www/html
    environment:
      # 如果是连接外部SMTP，这里放外部SMTP的配置
      # - SMTP_HOST=smtp.your-mail-provider.com
      # - SMTP_PORT=587
      # - SMTP_USERNAME=your-email@example.com
      # - SMTP_PASSWORD=your-email-password
      # - MAIL_FROM_ADDRESS=no-reply@your-domain.com
      # - MAIL_FROM_NAME=Your Application

      # 如果是连接Mailhog（用于本地测试）
      - SMTP_HOST=mailhog # Mailhog服务名即为主机名
      - SMTP_PORT=1025 # Mailhog的SMTP端口
      - MAIL_FROM_ADDRESS=test@example.com
      - MAIL_FROM_NAME=Local Test App
    networks:
      - app-network

  mysql:
    image: mysql:8.0
    environment:
      MYSQL_ROOT_PASSWORD: root_password
      MYSQL_DATABASE: my_database
    volumes:
      - db_data:/var/lib/mysql
    networks:
      - app-network

  mailhog:
    image: mailhog/mailhog:latest
    logging:
      driver: 'none' # 禁用日志，避免日志文件过大
    ports:
      - "8025:8025" # Mailhog的Web UI端口
    networks:
      - app-network

networks:
  app-network:
    driver: bridge

volumes:
  db_data:

FROM php:8.2-fpm-alpine

# 安装常用的PHP扩展和Composer
RUN apk add --no-cache \
    curl \
    libzip-dev \
    libpng-dev \
    jpeg-dev \
    freetype-dev \
    git \
    nodejs \
    npm \
    icu-dev \
    libxml2-dev \
    oniguruma-dev \
    zlib-dev \
    gmp-dev \
    libpq-dev \
    postgresql-dev \
    sqlite-dev \
    openssl-dev \
    supervisor \
    # Add any other required dependencies for your PHP application

RUN docker-php-ext-install pdo pdo_mysql opcache zip gd intl soap pcntl exif bcmath gmp
RUN docker-php-ext-configure gd --with-freetype --with-jpeg \
    && docker-php-ext-install -j$(nproc) gd

# 安装Composer
COPY --from=composer/composer:latest-bin /composer /usr/bin/composer

WORKDIR /var/www/html

# 复制你的应用代码
COPY . /var/www/html

# 安装Composer依赖
RUN composer install --no-dev --optimize-autoloader

# 调整权限
RUN chown -R www-data:www-data /var/www/html/storage /var/www/html/bootstrap/cache \
    && chmod -R 775 /var/www/html/storage /var/www/html/bootstrap/cache

EXPOSE 9000
CMD ["php-fpm"]