Laravel 12: New Features, Helpers, and Practical Upgrade Notes

What Actually Changed in Laravel 12

Laravel 12 is a focused release. Rather than introducing sweeping architectural shifts, it refines the developer experience around application bootstrapping, ships opinionated starter kits as first-party packages, and adds a handful of ergonomic helpers. If you are already on Laravel 11, the upgrade surface is small — but a few spots will bite you if you skip the release notes.

Starter Kits as First-Party Packages

The most visible change is that the React, Vue, and Livewire starter kits are now maintained as separate Composer packages under the laravel/ namespace rather than being baked into the installer scaffolding.

# React + Inertia starter kit
composer create-project laravel/laravel my-app
cd my-app
php artisan install:api          # optional API scaffolding
php artisan install:broadcasting # optional Reverb scaffolding

# Then pull the starter kit of your choice
php artisan breeze:install react --typescript

This separation means the core framework no longer ships with any frontend opinion. The laravel/breeze and laravel/jetstream packages are updated to match, but the install commands remain familiar.

Bootstrap and Application Structure

Laravel 11 introduced the slimmed-down bootstrap/app.php that replaced app/Http/Kernel.php and app/Console/Kernel.php. Laravel 12 keeps that structure and makes it the only supported path — the legacy kernel stubs are removed from the installer entirely.

If you are upgrading from Laravel 10 directly, you must migrate to the new bootstrap style before targeting Laravel 12:

// bootstrap/app.php — the only kernel you need
return Application::configure(basePath: dirname(__DIR__))
    ->withRouting(
        web: __DIR__.'/../routes/web.php',
        api: __DIR__.'/../routes/api.php',
        commands: __DIR__.'/../routes/console.php',
        health: '/up',
    )
    ->withMiddleware(function (Middleware $middleware) {
        $middleware->web(append: [
            \App\Http\Middleware\HandleInertiaRequests::class,
        ]);
    })
    ->withExceptions(function (Exceptions $exceptions) {
        //
    })
    ->create();

New and Refined Helpers

Number::spell() and Number::ordinal()

The Number facade gains two helpers that are genuinely useful for UI copy:

use Illuminate\Support\Number;

Number::spell(3);        // 'three'
Number::ordinal(21);     // '21st'
Number::ordinal(2);      // '2nd'

Str::chopStart() and Str::chopEnd()

These trim a specific prefix or suffix exactly once — cleaner than a regex for URL or path manipulation:

use Illuminate\Support\Str;

Str::chopStart('/api/v1/users', '/api'); // '/v1/users'
Str::chopEnd('hello.blade.php', '.php'); // 'hello.blade'

once() Global Helper

The once() helper memoizes the result of a closure for the lifetime of the request, scoped to the object instance when called inside a class:

class PricingService
{
    public function baseRate(): float
    {
        return once(fn () => $this->fetchRateFromDatabase());
    }
}

This is particularly useful in Filament resources where the same computed value is accessed multiple times during a single render cycle.

Upgrade Checklist

1. Require Laravel 12 — update composer.json to "laravel/framework": "^12.0" and run composer update.
2. Migrate legacy kernels — if still on app/Http/Kernel.php, follow the Laravel 11 upgrade guide first.
3. Check removed facades — Schema::connection() shorthand behaviour was tightened; explicit connection calls are now required.
4. Review middleware aliases — any string-keyed middleware aliases registered in the old kernel must move to bootstrap/app.php via $middleware->alias().
5. Run your test suite — Pest and PHPUnit both work; no test runner changes are required.
6. Update laravel/breeze or laravel/jetstream — pull the latest major version of whichever starter kit you use.

Takeaways

• Laravel 12 is an evolutionary release; the upgrade from 11 is low-risk.
• Starter kits are now decoupled first-party packages, not installer scaffolding.
• The slim bootstrap/app.php is now the only supported bootstrap path.
• Str::chopStart(), Str::chopEnd(), Number::ordinal(), and once() are immediately useful in real applications.
• Upgrading from Laravel 10 requires an intermediate stop at Laravel 11 to adopt the new bootstrap structure.