GUIDES
Middleware runs between a request arriving and a controller handling it — the mechanism behind auth checks, CORS headers, and rate limiting, all inspecting or modifying the request/response without the controller knowing.
This error means Laravel's service container can't resolve the class the route is pointing at — almost always a namespace mismatch, a typo, or a stale autoload cache, not an actually missing file.
The backend piece — a debounced, rate-limited JSON search endpoint — stays the same regardless of which frontend autocomplete widget consumes it, and that endpoint is the part actually worth getting right.
Passing the same data (a site name, a list of categories for a navbar) into every single controller method that returns a view doesn't scale — View::share() and view composers exist to avoid exactly that repetition.
Beyond a basic Route::get(), the features that actually shape a real app's routes are parameters, route model binding, named routes, and grouping shared middleware or prefixes together.
php artisan make:component, passing data as props, and the difference between a class-backed component and an anonymous view-only one.
The confirmed rule has one specific, easy-to-miss requirement: the confirmation field must be named exactly {field}_confirmation, or the rule silently never matches anything.
A plain unique rule breaks in two common situations — editing a record without triggering a false "already taken" error against itself, and soft-deleted rows still counting as taken.
An unchecked checkbox sends no value at all in the request, not false — Laravel's accepted rule exists specifically to handle this quirk correctly.
By default Laravel pagination links drop your filter/sort query params on page 2+. Here is how to keep them with appends() or withQueryString().
A bulk insert() call skips every model event and timestamp auto-fill Eloquent normally handles — a trade genuinely worth making for raw insert speed, but only when those side effects aren't actually needed.
Anything slow that doesn't need to finish before the response is sent — an email, a report export, a third-party API call — belongs in a queued job, not inline in the request.
