CodeIgniter PDO database driver not working

Question

I\'m trying to use the PDO MySQL driver in my CodeIgniter application. This is my database config:

$active_group = \'default\';
$active_record = TRUE;

$db[\         


        

Answer 1

According to CodeIgniter's Database Configuration page,

For the PDO driver, you should change the 'hostname => 'localhost'' to "'hostname' => mysql:host=localhost" like below:

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'mysql:host=localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'database_name',
    'dbdriver' => 'pdo',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
     .....
     .....
);

Answer 2

This should not be the case.

localhost;dbname=testdatabase

should be

mysql:dbname=testdatabase;host=localhost;

Answer 3

On file /application/config/database.php where is

$db['default']['hostname'] = 'localhost';

must be

$db['default']['hostname'] = 'mysql:host=localhost';

localhost or your database host.

Answer 4

PDO driver require a full DSN string to be provided. The string like this

'dsn' = ‘mysql:host=localhost;dbname=databasename’;

when you use this string you should remove host and databasename value from array. I think following example gives you an idea.

$db['default'] = array(
'dsn'   => 'mysql:host=localhost;dbname=codeigniter3',
'hostname' => '',
'username' => 'root',
'password' => '',
'database' => '',
'dbdriver' => 'pdo',
'dbprefix' => '',
'pconnect' => FALSE,
'db_debug' => TRUE,
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE
);

Thanks