Codeigniter + Lampstack - 无法连接到您的数据库

Question

我在我的本地主机上有这个，它完全正常。

但是当我把它放在服务器上时我正确配置了数据库设置

这是我的config / database.php

$db['default'] = array(
    'dsn'      => '',
    'hostname' => '111.111.1.111', //sample host
    'username' => 'root',
    'password' => 'password',
    'database' => 'mydatabase',
    'dbdriver' => 'mysqli',
    'port'     => '1234',
    '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' => FALSE
);

但我得到的只是错误

Unable to connect to your database server using the provided settings.

Filename: third_party/MX/Base.php

Line Number: 55

有什么问题？