Codeigniter/Postgresql: Site works but cannot fetch data from db - php

Question

I am using Postgresql database connection with codeigniter. I am new to postgresql. The site opens. But I cannot login nor fetch any values from the database.
I will upload the code for my config file as well as the database.php file.
config.php
// Keep as it is for same if MySQL server is running on same server
define("DBHOSTNAME",'ip_address');
// Add your database name here
define("DBNAME",'db_name'); // Here the database name is 'dummy_myecommerce'
// Add your database user name here
define("DBUSER",'username'); // Here the username is 'dummy_website'
// Add your database password here
define("DBPWD",'password');
Now I will upload the database.php file:
$db['default']['hostname'] = 'ip_address';
$db['default']['username'] = 'username';
$db['default']['password'] = 'password';
$db['default']['database'] = 'db_name';
$db['default']['dbdriver'] = 'postgre';
$db['default']['dbprefix'] = 'pre_';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = FALSE;
$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;
$db['default']['port'] = 5432;
If anything else is required, please let me know. Thanks

Answer 1

Some database drivers (such as PDO, PostgreSQL, Oracle, ODBC) might require a full DSN string to be provided. If that is the case, you should use the ‘dsn’ configuration setting, as if you’re using the driver’s underlying native PHP extension, like this:
// PDO
$db['default']['dsn'] = 'pgsql:host=localhost;port=5432;dbname=database_name';
Helpful link - http://www.codeigniter.com/user_guide/database/configuration.html

Answer 2

Try this as well
$db['default']['hostname'] = 'pgsql:host=localhost;dbname=yourdb'; //set host
$db['default']['username'] = 'your username'; //set username
$db['default']['password'] = 'your password'; //set password
$db['default']['database'] = 'your database'; //set databse
$db['default']['dbdriver'] = 'pdo'; //set driver here