How can I get the number of likes a specific tweet has in PHP?

I am trying to get the number of likes a tweet I posted has to display in a pie chart alongside other things. Looking at the documentation I saw that the way to get a specific tweet is by doing

$resultado = $twitter->get('statuses/show/', $idpost);

and to retrieve the likes I read online that you can use

$result = $resultado->{"favorite_count"}; 

But when I print $result I get nothing at all.

I am probably doing something wrong but I can't find where I am failing, I also tried to print $resultado and same thing, I get nothing. I tried looking at other answers to similar questions online but nothing. Does anyone know a way to get the likes of a specific tweet? Just so you know I am using abraham's twitteroauth library for this. Someone willing to help? Thanks!

Edit: Just tried var_dump($resultado); and still, I am not getting anything from it.