使用一个Codeigniter安装的多个动态域

    ServerName dynamic1.example.com
    DocumentRoot /var/www/codeigniter/public
   <Directory /var/www/codeigniter/public>
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost><VirtualHost *:80>
    ServerName dynamic2.example.com
    DocumentRoot /var/www/codeigniter/public
   <Directory /var/www/codeigniter/public>
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

$route['dynamic1'] = 'controller1';
$route['dynamic2'] = 'controller2';

$db['dynamic1'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'username1',
    'password' => 'password1',
    'database' => 'database1',
    '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
);

$db['dynamic2'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'username2',
    'password' => 'password2',
    'database' => 'database2',
    '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
);

class Controller1 extends CI_Controller {
    public function index() {
        $domain = $_SERVER['HTTP_HOST'];
        $this->load->database('dynamic1', TRUE);
        // 根据$domain选择不同的业务逻辑
    }
}

class Controller2 extends CI_Controller {
    public function index() {
        $domain = $_SERVER['HTTP_HOST'];
        $this->load->database('dynamic2', TRUE);
        // 根据$domain选择不同的业务逻辑
    }
}