解决方案：Codeigniter版本3
application / config / database.php

Solution: Codeigniter version 3 application/config/database.php

$db['firebird'] = array(
        'dsn'   => '',
        'hostname' => 'localhost',
        'username' => 'sysdba',
        'password' => 'masterkey',
        'database' => 'C://database.GDB',
        'dbdriver' => 'ibase',
        'dbprefix' => '',
        'pconnect' => FALSE,
        'db_debug' => (ENVIRONMENT !== 'production'),
        'cache_on' => FALSE,
        'cachedir' => '',
        'char_set' => 'ANSI',
        'dbcollat' => 'NONE',
        'swap_pre' => '',
        'encrypt' => FALSE,
        'compress' => FALSE,
        'stricton' => FALSE,
        'failover' => array(),
        'save_queries' => TRUE
);