The command class brings the power in the custom CLI command. This PHP class extends Magento’s CLI Command foundation with the unique command logic.

Create a command class file called CustomCommand.php inside the app/code/<vendor>/<module>/Console/Command directory of your custom module that contains the following code:

<?php

namespace Dev\CustomModule\Console\Command;

use Symfony\Component\Console\Command\Command;

use Symfony\Component\Console\Input\InputInterface;

use Symfony\Component\Console\Output\OutputInterface;

class CustomCommand extends Command

{

protected function configure()

{

$this->setName('dev:helloworld');

$this->setDescription('Custom command example.');

parent::configure();

}

protected function execute(InputInterface $input, OutputInterface $output)

{

$output->writeln("Hello World");

}

}

These two lines of code set a name and description to identify the Command:

$this->setName('dev:helloworld');

$this->setDescription('Custom command example.');

This method contains the CLI command actions.

$output->writeln("Hello World");

This will write “Hello World” when you run the Command. The input argument provides access to passed CLI flags and options.

The class enables infinite automation possibilities through PHP. Complex workflows can be scripted into easy CLI access.