我发现了许多关于我的问题的解决方案，但我仍然无法解决它。这可能是另一个问题，或者很可能是我没有设法理解出了什么问题。经过几周的测试，我确实试图公开寻求一些支持。
我正在尝试在我的个人服务器（Ubuntu 22.04）上设置WordPress。
下面是我的docker-compose文件：

version: '3'

services:
  wp-db:
    container_name: wp-mysql_container
    image: mysql:latest
    restart: unless-stopped
    environment:
      TZ: "Europe/Paris"
      MYSQL_ROOT_PASSWORD: ZZZZ
      MYSQL_USER: mywpuser
      MYSQL_DATABASE: mywpdb
      MYSQL_PASSWORD: XXXX
      MYSQL_TCP_PORT: 3307
    volumes:
      - ./wp-db_data:/var/lib/mysql
    ports:
      - 3307:3307
  
  wordpress:
    container_name: wordpress_container
    image: wordpress:latest
    restart: always
    depends_on:
      - wp-db
    ports:
      - 8082:80
    environment:
      WORDPRESS_DB_HOST: wp_db:3307
      WORDPRESS_DB_USER: mywpuser
      WORDPRESS_DB_PASSWORD: XXXX
      WORDPRESS_DB_NAME: mywpdb
    volumes:
      - ./wordpress:/var/www/html
      - ./wordpress_logs:/var/log/apache2

  wp-phpmyadmin:
    container_name: wp-phpmyadmin_container
    image: phpmyadmin:latest
    depends_on:
      - wp-db
    links: 
      - wp-db:wp-db
    ports: 
      - 8083:80
    environment:
      UPLOAD_LIMIT: 100000000
    restart: unless-stopped

volumes:
  wordpress:
  wordpress_logs:
  wp-db:
  wp-db_data:

当我试图达到的phpmyadmin的WordPress，我得到错误消息“数据库错误：建立数据库连接时出错”
任何帮助将不胜感激，谢谢
我试着追踪这些相关的主题：

• Wordpress Docker "Error establishing a database connection"
• Docker Wordpress: Error establishing a database connection
• DOCKER and WordPress: Error establishing a database connection

在许多其他人中...
编辑：2023/10/09现在我的docker-compose是这样的，并且正在工作：

version: '3.8'
services:
  wordpress:
    container_name: wordpress_container
    image: wordpress:latest
    restart: always
    ports:
      - 8082:80
    environment:
      WORDPRESS_DB_HOST: wp_db_mysql
      WORDPRESS_DB_USER: qqqqqqqqqqq
      WORDPRESS_DB_PASSWORD: aaaaaaaaaaaaaa
      WORDPRESS_DB_NAME: yyyyyyyyyyy
    volumes:
      - wp_data:/var/www/htmlqsdgjuytac
  wp_db_mysql:
    container_name: wp_mysql_container
    image: mysql:5.7
    restart: always
    ports:
      - 3307:3307
    environment:
      MYSQL_DATABASE: yyyyyyyyyyy
      MYSQL_ROOT_PASSWORD: bbbbbbbbbb
      MYSQL_USER: qqqqqqqqqqq
      MYSQL_PASSWORD: aaaaaaaaaaaaaa
    volumes:
      - db_data:/var/lib/mysql
  wp_phpmyadmin:
    container_name: wp_phpmyadmin_container
    image: phpmyadmin/phpmyadmin:latest
    depends_on:
      - wp_db_mysql
    ports:
      - 8083:80
    restart: always
    environment:
      PMA_HOST: mysql
      PMA_PORT: 3307
      PMA_ARBITRARY: 1
volumes:
  wp_data:
  db_data:

但是，当我尝试更改MYSQL_PASSWORD时，将所有“aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa我再次收到错误消息。我试过：

• docker-compose up -d
• docker-compose down && docker image prune -af后跟docker-compose up -d。

显然我不能相信“aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa