Laravel Blade @Currency, @usd and @Eur directives

helpers.php

<?php

/* Put this file in App/Helpers.php and load it in `composer.json` under `"autoload"`:

    "autoload": {
        "files": [
            "app/helpers.php"
        ],
    },

*/

if (! function_exists('format_currency')) {
    function format_currency($amount, $currency = 'eur', $locale = null): string
    {
        if ($locale === null) {
            $locale = app()->getLocale();
        }
        $euro_formatter = new NumberFormatter(app()->getLocale(), NumberFormatter::CURRENCY);
        return $euro_formatter->formatCurrency($amount, $currency);
    }
}

ViewServiceProvider.php

<?php

namespace App\Providers;

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

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

    /**
     * Bootstrap services.
     *
     * @return void
     */
    public function boot()
    {
        /**
         * Blade @currency directive localizes an amount into a currency string
         *
         * Examples:
         * - if locale is 'en': `@currency(45.49, 'usd')` outputs `$45.69`
         * - if locale is 'en': `@currency(45.49, 'usd', 'fr')` outputs `45,69&nbsp;$US`
         * - if locale is 'fr': `@currency(45.49, 'eur')` outputs `45,69&nbsp;€`
         */
        Blade::directive('currency', function ($expression) {
            return "<?php echo format_currency($expression); ?>";
        });

        /**
         * Blade @eur directive localizes an amount in Euros
         *
         * Examples:
         * - if locale is 'fr': `@eur(45.49)` outputs `45,69&nbsp;€`
         * - if locale is 'en': `@eur(45.49)` outputs `€45.69`
         */
        Blade::directive('eur', function ($expression) {
            return "<?php echo format_currency($expression, 'eur'); ?>";
        });

        /**
         * Blade @usd directive localizes an amount in US Dollars
         *
         * Examples:
         * - if locale is 'fr': `@usd(45.49)` outputs `45,69&nbsp;$US`
         * - if locale is 'en': `@usd(45.49)` outputs `$45.69`
         */
        Blade::directive('usd', function ($expression) {
            return "<?php echo format_currency($expression, 'usd'); ?>";
        });
    }
}

Since this week, it’s possible to rewrite this with Number::currency.