(Laravel) Allow request only if Referrer header is base same domain

RestrictFromReferer.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\URL;
use Illuminate\Support\Str;

class RestrictFromReferer
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @param  int $status
     * @return mixed
     */
    public function handle($request, Closure $next, int $status = 403)
    {
        $referer = $request->header('referer', '');

        if (! Str::endsWith(base_domain($referer), URL::domain())) {
            abort($status);
        }

        return $next($request);
    }
}

• base_domain()

if (! function_exists('base_domain')) {
    /**
     * Get the base host URL from the parameter.
     *
     * @param string $url
     * @return string
     */
    function base_domain(string $url)
    {
        return parse_url($url, PHP_URL_HOST);
    }
}

• URL::domain()

use Illuminate\Support\Facades\URL;
use Illuminate\Support\Str;

if (! URL::hasMacro('domain')) {
    URL::macro('domain', function (string $sub = '') {
        if ($sub !== '' && ! Str::endsWith($sub, '.')) {
            $sub .= '.';
        }

        return $sub . base_domain(config('app.url'));
    });
}