Question

发生数据库错误

无法使用提供的设置连接到数据库服务器。

文件名：libraries / Session / Session.php

行号：102

我是CI的新手，我开始Db到我的网站我收到此错误，我不知道如何重新开始。

请问你能解决这个错误吗？

应用/配置/ database.php中

    $active_group = 'default';
    $query_builder = TRUE;
    require_once('mainconfig.php');
 $db['default'] = array(
        'dsn'   => '',
        'hostname' => $config['mysql_host'],
        'username' => $config['mysql_username'],
        'password' => $config['mysql_password'],
        'database' => $config['mysql_database'],
        'dbdriver' => $config['mysql_driver'],
        'dbprefix' => '',
        'pconnect' => FALSE,
        'db_debug' => TRUE,
        'cache_on' => FALSE,
        'cachedir' => '',
        'char_set' => $config['mysql_charset'],
        'dbcollat' => $config['mysql_dbcollat'],
        'swap_pre' => '',
        'encrypt' => FALSE,
        'compress' => FALSE,
        'stricton' => FALSE,
        'failover' => array(),
        'save_queries' => TRUE
);

应用/配置/ mainconfig.php

 defined('BASEPATH') OR exit('No direct script access allowed');
 $config['mysql_host'] = 'localhost';
 $config['mysql_username'] = 'xxxcc';
 $config['mysql_password'] = 'xxxcc';
 $config['mysql_database'] = 'xxccv';
 $config['mysql_driver'] = 'mysqli';
 $config['mysql_charset'] = 'utf8';
 $config['mysql_dbcollat'] = 'utf8_general_ci';
 $config['base_js'] = 'assets/js';
 $config['base_css'] = 'assets/css';
 $config['base_plugins'] = 'assets/plugins';
 $config['base_images'] = 'assets/images';
 $config['base_fonts'] = 'assets/font-awesome';
 $config['other_base'] = 'assets/fonts';
 $config['email_author'] = 'admin@localhost';
 $config['limit'] = 7;

Answer 1

如果您使用codeigniter 3，请使用最新版本的PHP。一旦我得到这些错误，但后来我更新我的PHP然后它成功设置我的项目上的codeigniter后工作。

请关注您的application / config / database.php

$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'db_bdtimes', // your 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
);

Answer 2

只需改变，它肯定会起作用

$ db [＆＃39;默认＆＃39;] [＆＃39;主机名＆＃39;] =＆＃39; localhost＆＃39;;

到

$ db [＆＃39;默认＆＃39;] [＆＃39;主机名＆＃39;] =＆＃39; 127.0.0.1＆＃39;;

CodeIgniter：无法使用提供的连接到您的数据库服务器

2 个答案: