@BardiaAfshin in the Console component there is nothing to support emoticons explicitly ... but there isn't either anything to prevent showing them.

In fact, in the #10356 issue you can see an example of a "weird" progress bar created with the Symfony Console component to show all its features and it uses an emoticon.

Have you seen a Nyan Cat progress bar?

Yea, is that possible right now? It's so unnecessary, but that would make me so happy 😸

I made a helper class, you can use it if you want.
https://github.com/connorhu/php-emoticons/blob/master/Emoticons.php

on OSX:
include_once('Emoticons.php');
echo Emoticons::BEER_MUG . "\n";

Closing as it is possible already and because "Simplifying" this with nice constants (like demonstrated by @connorhu) is out of the scope of Symfony.

or in symfony:

use EmoticonHelper\Emoticons;
....
$output->writeLn(Emoticons::BEER_MUG);