xdebug/blog/vendor/symfony/console/Tests/Fixtures/FooCommand.php

<?php

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class FooCommand extends Command
{
    public $input;
    public $output;

    protected function configure()
    {
        $this
            ->setName('foo:bar')
            ->setDescription('The foo:bar command')
            ->setAliases(array('afoobar'))
        ;
    }

    protected function interact(InputInterface $input, OutputInterface $output)
    {
        $output->writeln('interact called');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $this->input = $input;
        $this->output = $output;

        $output->writeln('called');
    }
}