adding widget area

What do you mean exactly with “page post or category”? You mean everywhere except home and after the, say the title of the post/archive/page ?

I would like to insert the widget after the all title (page, post, category), to be able to insert additional menus (with plugin jquery mega menu)

Change hook.
You can use:
add_action ('__before_loop', 'add_my_widget_area', 20);
instead of
add_action ('__after_header', 'add_my_widget_area', 0);

Is that what you wanted?

I would like to insert the widget under the title h2

Since pages and posts pages don’t have an h2 (if you didn’t change it in customizr code or using a filter), I suppose you want to have a menu under each post title in lists of posts. Or you’re talking about the tagline in the header?
Hey give me a picture ’cause clearly there’s something confusing here.

this is example:
https://provaleague.altervista.org/wp-content/uploads/2014/03/Immagine1.jpg
I want put this menu after title

After “regolamento”?
Why do you say it’s h2 ?
Anyway, the first suggestion I gave you should do that, doesn’t it?

That will work good just in singles (page or posts). Always assuming that was what you wanted to achieve, that’s the complete snippet:

// Place the widget area after the header
add_action ('wp_head', 'add_my_widget_area');
function add_my_widget_area() {
    if (! function_exists('dynamic_sidebar'))
        return;
    $hook = null;

    if ( is_singular() && ! tc__f('__is_home'))
        $hook = '__before_content';
    elseif ( is_archive() )
        $hook = '__before_loop';

    if ( $hook )
        add_action ($hook,
            function(){
                dynamic_sidebar('Extra Header Widget Area');
            },
            20
        );
    return;
}

Perfect, work, thanks a lot D4, really thanks

Really? Ahaha, I was starting to think I didn’t get anything of your real issue, what a relief.
Glad you solved.
Would you mind marking this topic as resolved?
thank you

sorry ??

Oh no don’t be sorry, I know it’s something “hidden”. ??

Sorry d4, and for put header widget after slider?

Hey ??
Open a new topic please, also be more specific, e.g. I don’t get, you want another widget area after the slider?