MySQL远程连接失败,出现“未知身份验证方法”

我试图从我的本地机器远程连接MySQL服务器,但我收到以下错误：

Warning: PDO::__construct(): The server requested authentication 
method unknown to the client [mysql_old_password] in 
C:\xampp\htdocs\ticket\terminal\sync.php

SQLSTATE[HY000] [2054] The server requested authentication method 
umknown to the client

我的本地MySQL服务器版本是5.5.27,libmysql – mysqlnd 5.0.10
远程MySQL服务器版本是5.5.23,mysqlnd版本没有公开.

我想这是一个不兼容的密码哈希问题,但我不知道如何解决它.
以下是我的连接代码的一部分

$dsn = 'mysql:host=184.173.209.193;dbname=my_db_name';
$options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',
); 

try {
    $online_dbh = new PDO($dsn, 'myusername', 'mypassword', $options);
    $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Congratulations!";
} catch (PDOException $e) {
    echo $e->getMessage();
} 

解决方法:

假设您使用的是PHP 5.3,您可能会遇到Backward Incompatibility Changes之一：

The new mysqlnd library necessitates the use of MySQL 4.1’s newer 41-byte password format. Continued use of the old 16-byte passwords will cause mysql_connect() and similar functions to emit the error, “mysqlnd cannot connect to MySQL 4.1+ using old authentication.”

如果是,请参阅https://stackoverflow.com/a/1340538/187954以获取有关更新密码的信息.

标签：mysql,pdo,database-connection,remote-access
来源： https://codeday.me/bug/20190918/1811164.html