inanzzz | Creating a standalone symfony component

In example below, we're going to create a console command as a standalone application. You can also include this application in another application by requiring "inanzzz/hello-console-command": "dev-master" in composer.json file.

Project structure

my-test-app
    bin
        console
    src
        Command
            HelloCommand.php
    composer.json

Composer.json file

After creating the composer.json in project root, you need to run composer install command.

{
  "name": "inanzzz/hello-console-command",
  "description": "Say hello package.",
  "type": "library",
  "version": "1.0.0",
  "autoload": {
    "psr-0": {
      "Command": "src/"
    }
  },
  "require": {
    "symfony/console": "2.*"
  },
  "minimum-stability": "stable",
  "bin": [
    "bin/console"
  ]
}

Console file

Create bin/console file and grant executable permissions to it with chmod +x bin/console command.

#!/usr/bin/env php
<?php
set_time_limit(0);

(@include_once __DIR__ . '/../vendor/autoload.php') || @include_once __DIR__ . '/../../../autoload.php';

use Command\HelloCommand;
use Symfony\Component\Console\Application;

$app = new Application('My CLI Application', '1.0.0');
$app->add(new HelloCommand());
$app->run();

HelloCommand.php file

# src/Command/HelloCommand.php
<?php

namespace Command;

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

class HelloCommand extends Command
{
    protected function configure()
    {
        $this
            ->setName('say:hello')
            ->setDescription('Say hello to someone')
            ->addArgument(
                'name',
                InputArgument::OPTIONAL,
                'Who do you want to say hello?'
            );
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $name = $input->getArgument('name');
        $hello = $name ? 'Hello '.$name : 'Hello';

        $output->writeln($hello);
    }
}

Test

my-test-app$ bin/console say:hello inanzzz
Hello inanzzz