php连接docker-compose里面的mysql数据库

docker-compose配置文件：

version: '3'
services:
  mysql:
   image: "mysql:5.7.19"
   container_name: ysp_mysql_57
   environment:
       TZ: Asia/Shanghai
       MYSQL_ROOT_PASSWORD: "123456"
   restart: always
   command:
       --character-set-server=utf8mb4
       --collation-server=utf8mb4_general_ci
       --explicit_defaults_for_timestamp=true
       --lower_case_table_names=1
       --max_allowed_packet=128M
       --default-authentication-plugin=mysql_native_password
       --sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO"
   volumes:
       - mysql-data:/var/lib/mysql
   ports:
       - "3357:3306"

  web:
   image: nginx:latest
   container_name: ysp_nginx
   ports:
   - "80:80"
   - "89:89"
   restart: always
   volumes:
   - D:\www:/opt/WebRoot

   - ./nginx/nginx.conf:/etc/nginx/nginx.conf
   - ./nginx/conf.d:/etc/nginx/conf.d/:ro
   environment:
   - TZ=Asia/Shanghai
   links:
   - php

  php:
   image: registry.gz.xx.cn/xx/php:7.3.0
   container_name: ysp_php_70
   ports:
   - "9000"
   restart: always
   volumes:
   - D:\www:/opt/WebRoot
   - ./php/conf/php-fpm.conf:/usr/local/etc/php-fpm.conf
   - ./php/conf/www.conf:/usr/local/etc/php-fpm.d/www.conf
   environment:
   - TZ=Asia/Shanghai
   - LC_ALL=C.UTF-8
   links:
   - mysql

  redis:
   image: redis
   container_name: ysp_redis
   ports:
   - "6379:6379"
   environment:
   - TZ=Asia/Shanghai
   volumes:
       - redis_data:/var/lib/redis
volumes:
  mysql-data:
  redis_data:

docker-compose启动：

docker-compose up -d

注意修改 docker-compose.yml之后，需要运行：

docker-compose down

这个命令会删除原来的容器，并重新加载yml配置文件。

php连接docker-compose里面的mysql:

class TestController extends AppController {

    public function test() {
        $dsn = 'mysql:dbname=mysql;host=mysql;port=3306';
        $username = 'root';
        $password = '123456';
        try {
            $db = new PDO($dsn, $username, $password);
        } catch (PDOException $e) {
            die('Could not connect to the database:' . $e);
        }
        $statement = <<<SQL
            SELECT *
            FROM `user`
SQL;
        $sth = $db->prepare($statement);
        $sth->execute();

/* 获取结果集中所有剩余的行 */
        print("Fetch all of the remaining rows in the result set:\n");
        $result = $sth->fetchAll();
        echo "<pre>";
        print_r($result); // phpinfo();
        echo "</pre>";
        exit;
        die('safdsa');
    }

参考：

​​https://www.digitalocean.com/community/tutorials/how-to-set-up-laravel-nginx-and-mysql-with-docker-compose​​