Command example

command.php

<?php

use Symfony\Component\Console\Application;
use Symfony\Component\Console\ConsoleEvents;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\EventDispatcher\EventDispatcher;

require_once __DIR__.'/vendor/autoload.php';

$sentences = array(
    'en' => 'Hello %s!',
    'fr' => 'Bonjour %s!',
    'es' => '¡ Hola %s !',
);

$dispatcher = new EventDispatcher();
$dispatcher->addListener(ConsoleEvents::EXCEPTION, function ($e) use ($sentences) {
    if (!$e->getOutput()->isVerbose()) {
        return;
    }

    $message = $e->getException()->getMessage().' Available are: '.implode(', ', array_keys($sentences));
    $e->setException(new \RuntimeException($message));
});

$app = new Application();
$app->setDispatcher($dispatcher);

$app
    ->register('hello')
    ->addArgument('name', InputArgument::IS_ARRAY, '', array('world'))
    ->addOption('lang', null, InputOption::VALUE_OPTIONAL, '', 'en')
    ->setCode(function($i, $o) use ($sentences) {
        $names = $i->getArgument('name');
        $lang = $i->getOption('lang');

        if (!isset($sentences[$lang])) {
            throw new \RuntimeException(sprintf(
                'No message configured for language "%s".',
                $lang
            ));
        }

        foreach ($names as $name) {
            $o->writeln(sprintf($sentences[$lang], $name));
        }
    })
;

$app->run();