Codeigniter database connection check

ci-database-debug.md

Add following code to debug database connection in codeigniter

echo '<pre>';
 print_r($db['default']);
echo '</pre>';

echo 'Trying to connect to database: ' .$db['default']['database'];
$dbh=mysql_connect
(
$db['default']['hostname'],
$db['default']['username'],
$db['default']['password'])
or die('Cannot connect to the database because: ' . mysql_error());
mysql_select_db ($db['default']['database']);

echo '<br />   Connected OK:'  ;
die( 'file: ' .__FILE__ . '--> Line: ' .__LINE__);