在 PHP 中创建到 PDO 的连接时出错

问题描述

今天为了迁移到php 5.30，我把最新版的lampp卸载重装了，突然一个很简单的app连接mysql数据库失败.我正在使用 PDO 进行连接，并收到以下错误:

Today, I removed and reinstalled the latest version of lampp in order to move to php 5.30, and suddenly a very simple app is failing to connect to the mysql database. I'm using PDO to connect, and receiving the following error:

Warning: PDO::__construct() [pdo.--construct]: [2002] Invalid argument (trying to connect 
via unix://) in /home/raistlin/www/todoapp/home.php on line 9

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002]
Invalid argument' in /home/raistlin/www/todoapp/home.php:9 Stack trace: #0
/home/raistlin/www/todoapp/home.php(9): PDO->__construct('mysql:host=loca...', 'USER', 
'PASSWORD') #1 {main} thrown in /home/raistlin/www/todoapp/home.php on line 9

为了调试，我目前没有捕捉到错误.

I am not catching the error at the moment, for the sake of debugging it.

以下代码足以在我的系统上复制该问题:

The following code is enough to replicate the issue on my system:

<?php
$DBACCESS = array(
    "connstring"=>"mysql:host=localhost;dbname=todoapp",
    "host"=>"localhost",
    "user"=>"user",
    "password"=>"password",
    "todoapp"=>"todoapp"
    );

    echo implode('<br >',$DBACCESS);

    $dbh = new PDO($DBACCESS['connstring'],$DBACCESS['user'],$DBACCESS['password']);

    $dbh = null;
?>

在网上查找，我发现一两个其他人遇到了同样的问题，但他们都没有收到回复，更不用说有效的回复了.有谁知道发生了什么?我在配置中遗漏了什么吗?我需要做什么来修复它?

Looking online, I've found one or two other people with the same issue, but none of them have received a response, much less a working one. Does anyone know what is happening? Is there something I missed in the configuration? What do I need to do to fix it?

推荐答案

通常意味着你需要指定 TCP/IP (1)，或者告诉 MySQL 你的 Unix socket 在哪里 (2):

Usually means that you need to specify TCP/IP (1), or tell MySQL where your Unix socket is (2):

1. "mysql:host=127.0.0.1" 或 "mysql:host=localhost;port=3306"
2. "mysql:unix_socket=/var/run/mysqld/mysqld.sock"

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