Question

I want to change some database settings for one part of my program.

In my setup the databse class is autoloaded with a config which looks like this

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '****';
$db['default']['database'] = 'database';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

At one part of the script I want to change the value of $db['default']['keyname'] , how can I do this?

Answer 1

You should be adding another set of credentials instead of changing the existing ones dynamically:

$db['another_db']['hostname'] = 'localhost';
$db['another_db']['username'] = 'root';
$db['another_db']['password'] = '****';
$db['another_db']['database'] = 'database';
$db['another_db']['dbdriver'] = 'mysql';
$db['another_db']['dbprefix'] = '';
$db['another_db']['pconnect'] = TRUE;
$db['another_db']['db_debug'] = TRUE;
$db['another_db']['cache_on'] = FALSE;
$db['another_db']['cachedir'] = '';
$db['another_db']['char_set'] = 'utf8';
$db['another_db']['dbcollat'] = 'utf8_general_ci';
$db['another_db']['swap_pre'] = '';
$db['another_db']['autoinit'] = TRUE;
$db['another_db']['stricton'] = FALSE;

You can load this other database by doing:

$another_db = $this->load->database('another_db', TRUE);

Then use it like normal database driver:

$another_db->select();
...etc