A sample of custom Artisan command

DatabaseEnvironment.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Filesystem\Filesystem;

class DatabaseEnvironment extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'env:db';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Configure database settings';

    /**
     * @var File
     */
    private $file;

    public function __construct(Filesystem $file)
    {
        $this->file = $file;

        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $this->doAsks();
    }

    private function doAsks()
    {
        $database = $this->ask('What is your database name?');
        $username = $this->ask('What is your database username?');
        $password = $this->secret('What is your database username\'s password?');

        $this->info('PLEASE CONFIRM YOUR DATABASE DETAILS');
        $this->line('');
        $this->info('Database Name: '.$database);
        $this->info('Username: '.$username);
        $this->info('Password: ********'); // purposely hide it

        if ($this->confirm('Are you confirm all the details are correct? [y|N]')) {

            $env = $this->laravel->app->basePath() . '/' . $this->laravel->app->environmentFile();
            $content = $this->file->get($env);
            
            $content = preg_replace("/^(DB_DATABASE=){1}\w+/im", "DB_DATABASE=".$database, $content, -1);
            $content = preg_replace("/^(DB_USERNAME=){1}\w+/im", "DB_USERNAME=".$username, $content, -1);
            $content = preg_replace("/^(DB_PASSWORD=){1}\w+/im", "DB_PASSWORD=".$password, $content, -1);
            
            $this->file->put($this->laravel->app->basePath() . '/.env', $content );

        } else {
           if ($this->confirm('Do you want to reconfigure? [y|N]')) {
                $this->doAsks();
           }
        }
    }
}