<?php

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\NullOutput;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

class MyCommand extends Command
{
    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $ioV = new SymfonyStyle($input, $output->isVerbose() ? $output : new NullOutput());
        $ioVV = new SymfonyStyle($input, $output->isVeryVerbose() ? $output : new NullOutput());
        $ioVVV = new SymfonyStyle($input, $output->isDebug() ? $output : new NullOutput());

        $ioV->writeln('message visible with -v only');
        $ioVV->writeln('message visible with -vv only');
        $ioVVV->writeln('message visible with -vvv only');
    }
}