CodeIgniter - Blank page at default controller

Question

I'm using CI 3 in my last project on my localhost, then I uploaded it into a server. When I tried to load the web it's always show the blank page.

I have tried configure .htaccess, config.php, database.php, route.php it seems there shouldn't have any error, then I check index.php and tried to show some text.

I tried to insert :

echo "test"; die();

for every statement in index.php, at the first it show the "test" but it disappear after switch function for environment :

switch (ENVIRONMENT)
{
    case 'development':
        error_reporting(-1);
        ini_set('display_errors', 1);
    break;
case 'testing':
case 'production':
    ini_set('display_errors', 0);
    if (version_compare(PHP_VERSION, '5.3', '>='))
    {
        error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED & ~E_STRICT & ~E_USER_NOTICE & ~E_USER_DEPRECATED);
    }
    else
    {
        error_reporting(E_ALL & ~E_NOTICE & ~E_STRICT & ~E_USER_NOTICE);
    }
break;

default:
    header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
    echo 'The application environment is not set correctly.';
    exit(1); // EXIT_ERROR

}

in case 'development' it's still show the 'test' string but when after break in this case, the 'test' string disappear.

Can anybody fix this?

Answer 1

Update!!
I have finally get the answer.
Actually when it routed into my default controller (maybe it's my fault or what I didn't remember it) there's exit; in construct function so it's never load any view.
Sorry for my less awareness