Codeigniter error when trying to connect to database using mysqli

Question

I am getting Following error in my CodeIgniter application which is live on server.

Here is the output of the error:

A PHP Error was encounte

Answer 1

u can add new user and pass and give it all privileges, like below:

CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'newuser'@'localhost';
FLUSH PRIVILEGES;

then, u should update your config.php file, with new user and pass.

Answer 2

Do the following:

1. In applications/config/database.php, add dbport => '3306', to the default array $db['default'] = array();
2. In system/database/DB_driver.php, change public $port = ''; to public $port = '3306';

Answer 3

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'xxx',
    '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 4

You can edit your server's php.ini file to define the port that CodeIgniter will use by default.

C:\wamp64\bin\apache\apache2.4.41\bin\php.ini

Default port number for mysqli_connect().

mysqli.default_port = 3308

Answer 5

Try to use the plain password with no special characters, below is the example:

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'password',
    'password' => 'Mynewpass@756',
    'database' => 'database_name',
);

Answer 6

Try to set config/database.php 'username' => 'xxx' to 'username' => 'root' without any password.

$db['default'] = array( 
'dsn' => '',
'hostname' => 'localhost',
'username' => 'root',
'password' => '',