# php artisan make:provider CustomBladeServiceProvider

   INFO  Provider [app/Providers/CustomBladeServiceProvider.php] created successfully.  

#

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class CustomBladeServiceProvider extends ServiceProvider
{
    /**
     * Register services.
     *
     * @return void
     */
    public function register()
    {
        //
    }

    /**
     * Bootstrap services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }
}

Next, you need to register the provider in the config/app.php file.

'providers' => [

        /*
         * Laravel Framework Service Providers...
         */
        // ...
        App\Providers\CustomBladeServiceProvider::class,

In your CustomBladeServiceProvider class, you can define your custom Blade directive using the Blade::directive method.

<?php

namespace App\Providers;

use Illuminate\Support\Facades\Blade;
use Illuminate\Support\ServiceProvider;

class CustomBladeServiceProvider extends ServiceProvider
{
    // ...

    /**
     * Bootstrap services.
     *
     * @return void
     */
    public function boot()
    {
        Blade::directive('money', function ($money) {
            return "$<?php echo number_format($money, 2); ?>";
        });
    }
}

You can now use your custom directive in your Blade templates like this:

<h1>
    @money(2500)
</h1>

We simply need a route now to see it in action.

Route::get('/custom-directive', function () {
    return view('custom-directive.index');
});

The response that you get is: $2,500.00.

Alternate Approach

Don’t want to create a service provider? You can add the directive to your AppServiceProvider boot method. In that instance, you don’t have to modify the config/app.php file.