mysql - 代码点火器 : A Database Error Occurred SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client

Question

我正在尝试将网站上传到服务器。 Code Igniter 是我在这个网站上使用的框架，我是第一次使用 CI。在尝试使用以下数据库设置将网站上传到服务器时:

 $db['default'] = array(
    'dsn'   => 'mysql:host=localhost;dbname=database_name',
    'hostname' => 'mysql:host=localhost',
    'username' => 'database_user',
    'password' => 'database_password',
    'database' => 'database_name',
    'dbdriver' => 'pdo',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
    );

我一直收到如下错误，我试图在网上搜索以解决我的问题。我发现了一些与我的相似的问题，但我无法弄清楚我应该做什么，因为大多数问题都是针对本地服务器的。请有人帮我解决这个问题，谢谢。

A Database Error Occurred

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

Filename: controllers/Home.php

Line Number: 9


A PHP Error was encountered

Severity: Warning  
Message: PDO::__construct(): The server requested authentication method unknown to the client [mysql_old_password]
Filename: pdo/pdo_driver.php
Line Number: 133

Backtrace:

编辑:

Answer 1

尝试:

$db['default'] = array(
    'hostname' => 'localhost',
    'username' => 'user',
    'password' => 'password',
    'database' => 'database_name',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

或

$db['default'] = array(
    'dsn'   => 'mysql:host=localhost;dbname=codeigniter',
    'username' => 'codeigniter',
    'password' => 'codeigniter',
    'database' => 'codeigniter',
    'dbdriver' => 'pdo',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);