Rebuilding Laravel's `old()` and `@error` Magic in Hypervel — The Real Way It Works

July 9, 2025 (1w ago)

Laravel developers are used to things “just working” — form validation, error messages, and input retention all feel seamless. But when you start building with Hypervel — a Laravel-inspired, coroutine-native PHP framework — you'll quickly realize that this magic needs a manual touch.

In this guide, I'll show you how I fully recreated Laravel's form UX in Hypervel, with working validation, session flashing, and Blade rendering — and zero Laravel internals.

🧩 What Laravel Does Silently

In Laravel, when you do:

$request->validate([
    'email' => 'required|email',
]);

It:

In Hypervel, you get control, not magic — so we'll build it all step-by-step.

✅ Final Working Hypervel Setup

📂 LoginController.php

<?php
 
namespace App\Http\Controllers\Auth;
 
use Hypervel\Http\Request;
use Hypervel\Support\Facades\Auth;
use Hypervel\Support\Facades\Validator;
use Psr\Http\Message\ResponseInterface;
use Hypervel\Support\MessageBag;
 
class LoginController
{
    public function show(): ResponseInterface
    {
        $errors = $this->errors();
        $old = $this->old();
 
        return view('auth.login', compact('errors', 'old'));
    }
 
    public function store(Request $request): ResponseInterface
    {
        $validator = Validator::make($request->all(), [
            'email' => ['required', 'email', 'exists:users,email'],
            'password' => ['required', 'min:2'],
        ]);
 
        if ($validator->fails()) {
            session()->flash('_errors', $validator->errors());
            session()->flash('_old_input', $request->all());
 
            return response()->redirect(url()->previous());
        }
 
        if (Auth::attempt($validator->validated())) {
            $request->session()->regenerate();
            return response()->redirect('/dashboard');
        }
 
        session()->flash('_errors', ['email' => ['Invalid credentials.']]);
        session()->flash('_old_input', $request->all());
 
        return response()->redirect(url()->previous());
    }
 
    private function errors(): MessageBag
    {
        $errors = session()->get('_errors', []);
        return $errors instanceof MessageBag ? $errors : new MessageBag($errors);
    }
 
    private function old(): array
    {
        return session()->get('_old_input', []);
    }
}

🧾 Blade View Snippet

<input type="email" name="email" value="{{ $old['email'] ?? '' }}">
@if ($errors->has('email'))
    <p class="text-red-500">{{ implode(', ', $errors->get('email')) }}</p>
@endif

You can build rich Tailwind layouts, password visibility toggles, and dynamic validations — all while still manually controlling the state via $old and $errors.

🧠 Key Takeaways

Feature Laravel Hypervel
old() Helper with session binding Manual: session()->get('_old_input')
@error() Blade directive Use $errors->has() and get()
validate() Auto-redirects on failure Use Validator::make() and flash
MessageBag Auto-injected Must be constructed manually

🛠 Tips for Further Optimization

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