Create helper command using stub and command

 First of all create stub folder inside the root director like below image

After that create a helper.stub file inside the stub folder

helper.stub

<?php

namespace App\Helpers;

class {{class}}

{

}

Now create a HelperCommand  using below command

php artisan make:command HelperCommand

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;

use Illuminate\Filesystem\Filesystem;

use Illuminate\Support\Pluralizer;

use Symfony\Component\CssSelector\Node\FunctionNode;

class HelperCommand extends Command

{

    /**

     * The name and signature of the console command.

     *

     * @var string

     */

    protected $signature = 'make:helper {className}';

    /**

     * The console command description.

     *

     * @var string

     */

    protected $description = 'Make a helper class';

    /**

     * Execute the console command.

     *

     * @return int

     */

    protected $files;

    public function __construct(Filesystem $files)

    {

        parent::__construct();

        $this->files = $files;

    }

    protected function makeDirectory($path)

    {

        if (!$this->files->isDirectory($path)) {

            $this->files->makeDirectory($path, 0777, true, true);

        }

        return $path;

    }

    public function  getSingularClassName($className)

    {

        return ucwords(Pluralizer::singular($className));

    }

    public function getStubPath()

    {

        return __DIR__ . '/../../../stubs/helper.stub';

    }

    public function getStubVariables()

    {

        return [

            'class' => $this->getSingularClassName($this->argument('className'))

        ];

    }

    public function getSourceFile()

    {

        return $this->getStubContents($this->getStubPath(), $this->getStubVariables());

    }

    public function getStubContents($stub, $stubVariables = [])

    {

        $contents = file_get_contents($stub);

        foreach ($stubVariables as $search => $replace) {

            $contents = str_replace('{{' . $search . '}}', $replace, $contents);

        }

        return $contents;

    }

    public function getSourcefilePath()

    {

        return base_path('App\\Helpers') . '\\' . $this->getSingularClassName($this->argument('className')) . 'Helper.php';

    }

    public function handle()

    {

        $path = $this->getSourceFilePath();

        $this->makeDirectory(dirname($path));

        $contents = $this->getSourceFile();

        $file = $this->argument('className')."Helper";

        if (!$this->files->exists($path)) {

            $this->files->put($path, $contents);

            $this->info(" {$path} created successfully ");

            // echo "\033[31m : {$path} created 033[0m \n";

        } else {

            // $this->info("File : {$path} already exits");

            echo "\033[31m $file is already exist \033[0m \n";

        }

    }

}

Creating for new helper use below command 

php artisan make:heler My

Ouput of above command