Ultimate Laravel Flashcards

Which Artisan command creates a new middleware class in Laravel?

Answer: php artisan make:middleware MyMiddleware

The `php artisan make:middleware` command scaffolds a new middleware class in the `app/Http/Middleware` directory.

In Laravel, what does the `withTrashed()` scope do when querying an Eloquent model?

Answer: Includes soft-deleted records in query results

`withTrashed()` extends a query to include rows where `deleted_at` is not null, used with soft-deleting models.

Which Laravel facade is used to dispatch a queued job?

Answer: Bus::dispatch()

The `Bus` facade (or the `dispatch()` helper) dispatches jobs; `Bus::dispatch(new MyJob())` queues or executes the job.

What is the purpose of Laravel's `config/cache.php` `prefix` option?

Answer: Prepends a string to all cache keys to avoid collisions across applications

The `prefix` option is prepended to every cache key, preventing collisions when multiple apps share the same cache store.

Which method on a Laravel Collection lazily evaluates a chain of operations without loading all items into memory at once?

Answer: lazy()

`LazyCollection::lazy()` or using `LazyCollection::make()` evaluates items one at a time using PHP generators, minimizing memory usage.

In Laravel's service container, what is 'contextual binding' used for?

Answer: Injecting different implementations of an interface depending on which class requests it

Contextual binding lets you specify that when class A needs an interface, it gets implementation X, while class B gets implementation Y.

What does the `@stack` Blade directive do?

Answer: Renders content that was pushed onto a named stack from child views

`@stack('name')` outputs everything pushed to that named stack via `@push` directives in child or included views.