‘comment_post’ hook doesn’t seem to work? [closed]

Does anyone know why this ‘comment_post’ hook doesn’t seem to work!?

…

When a comment is posted, the function is not triggered… at all?

The hook works. Try the following, it works:

add_action( 'comment_post', 'test_notify' );
function test_notify($args , $args2) {
    echo 'It works!'; 
    die;
}

As does this:

add_action( 'comment_post', 'test_notify' );
function test_notify($args , $args2) {
    echo 'It works!'; 
    header("Location: http://www.google.com");
    die;
}

This, in fact, works also but you are likely to get a 404:

add_action( 'comment_post', 'test_notify' );
function test_notify($args , $args2) {
    echo 'It works!'; 
    header("Location: /blog?thisworked=true");
    die;
}

You want to be using site_url() or home_url() probably:

add_action( 'comment_post', 'test_notify' );
function test_notify($args , $args2) {
    echo 'It works!'; 
    header('Location: '.home_url('/blog?thisworked=true'));
    die;
}

If those don’t work, something is interfering and I don’t know how to guess what.