Laravel Middleware to redirect users to currently configured app url

EnsureAppUrl.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class EnsureAppUrl
{
    private readonly string $expectedHost;

    public function __construct()
    {
        $this->expectedHost = $this->getExpectedHost();
    }

    /**
     * Handle an incoming request.
     *
     * @param \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response) $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        if ($request->method() !== 'GET')
            return $next($request);

        $currentHost = $request->host();

        if ($currentHost === $this->expectedHost)
            return $next($request);

        $newUrl = str_replace_first($currentHost, $this->expectedHost, $request->fullUrl());
        return redirect($newUrl, status: 301);
    }

    private function getExpectedHost(): string
    {
        $appUrl = config('app.url');
        return parse_url($appUrl, PHP_URL_HOST);
    }
}