Question

我刚遇到

PDOException: SQLSTATE[HY000] [2002] Connection refused in /var/www/html/inc/config/db.php on line 11

一开始我以为这与mysql服务器有关，但是经过数小时的尝试和错误，我发现如果使用mysqli_connect根本没有错误，那么错误就是来自PDO

$conn = new PDO("mysql:host=127.0.0.1;dbname=docker", "root", "tiger"); 


$conn = mysqli_connect("mysql", "root", "tiger", null);

我还尝试了不同的数据库，甚至尝试了新创建的数据库

有人知道为什么一个人工作而另一个人不工作吗？？

编辑：我正在使用docker-compose设置环境。这是docker-compose.yaml

version: "3"

services:
  webserver:
    build: 
      context: ./bin/webserver
    container_name: '7.1.x-webserver'
    restart: 'always'
    ports:
      - "80:80"
      - "443:443"
    links: 
      - mysql
    volumes: 
      - ${DOCUMENT_ROOT-./www}:/var/www/html
      - ./config/php/php.ini:/usr/local/etc/php/php.ini
      - ${VHOSTS_DIR-./config/vhosts}:/etc/apache2/sites-enabled
      - ${LOG_DIR-./logs/apache2}:/var/log/apache2
  mysql:
    build: ./bin/mysql
    container_name: '5.7-mysql'
    restart: 'always'
    ports:
      - "3306:3306"
    volumes: 
      - ${MYSQL_DATA_DIR-./data/mysql}:/var/lib/mysql
      - ${MYSQL_LOG_DIR-./logs/mysql}:/var/log/mysql
    environment:
      MYSQL_ROOT_PASSWORD: tiger
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: 'sc-phpmyadmin'
    links:
      - mysql
    environment:
      PMA_HOST: mysql
      PMA_PORT: 3306
    ports:
      - '8080:80'
    volumes: 
      - /sessions
  redis:
    container_name: 'sc-redis'
    image: redis:latest
    ports:
      - "6379:6379"
  mongo:
    container_name: 'mongodb'
    image: mongo:4.0.12-xenial
    restart: 'always'
    ports:
      - "${HOST_MACHINE_MONGO_PORT}:27017"
    volumes: 
      - ${MONGO_DATA_DIR-./data/mongodb}:/data/db
      - ${MONGO_LOG_DIR-./logs/mongodb/mongod.log}:/var/log/mongodb/mongod.log
      - ${MONGO_CONF-./config/mongodb/mongod.conf}:/etc/mongod.conf

Answer 1

我发现了连接不起作用的原因，是因为该连接正试图连接到端口8888。当它需要连接到端口8889时。

$conn = new PDO("mysql:host=127.0.0.1;port=8889;dbname=docker", "root", "tiger");

要在端口上查找侦听器，请执行以下操作：

netstat -tln

如果MySQL确实在该端口上侦听，您应该会看到类似以下的行。

tcp        0      0 127.0.0.1:3306              0.0.0.0:*

端口3306是MySql的默认端口。

如果您想知道运行Mysql的本地主机的端口号，可以在MySQL命令行客户端上使用此查询-

SHOW VARIABLES WHERE Variable_name = 'port';


mysql> SHOW VARIABLES WHERE Variable_name = 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

它将为您提供运行MySQL的端口号。

PDOException：SQLSTATE [HY000] [2002]连接被拒绝

1 个答案: