111 Flashcards
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Request Lifecycle
The entry point for all requests to a Laravel application is the public/index.php file. The index.php file loads the Composer generated autoloader definition, and then retrieves an instance of the Laravel application from bootstrap/app.php script. The first action taken by Laravel itself is to create an instance of the application / service container.
server meets the following requirements:
PHP >= 7.1.3 BCMath PHP Extension Ctype PHP Extension JSON PHP Extension Mbstring PHP Extension OpenSSL PHP Extension PDO PHP Extension Tokenizer PHP Extension XML PHP Extension
Homestead
Laravel Homestead is an official, pre-packaged Vagrant box that provides you a wonderful development environment without requiring you to install PHP, a web server, and any other server software on your local machine.
php artisan route:cache
reduces all of your route registrations into a single method call within a cached file
Request Lifecycle…
HTTP / Console Kernels
the incoming request is sent to either the HTTP kernel or the console kernel
app/Http/Kernel.php
The HTTP kernel extends the Illuminate\Foundation\Http\Kernel class, which defines an array of bootstrappers that will be run before the request is executed. These bootstrappers configure error handling, configure logging, detect the application environment, and perform other tasks that need to be done before the request is actually handled.
The HTTP kernel also defines a list of HTTP middleware that all requests must pass through before being handled by the application. These middleware handle reading and writing the HTTP session, determining if the application is in maintenance mode, verifying the CSRF token, and more.
Request Lifecycle…
Service Providers
One of the most important Kernel bootstrapping actions is loading the service providers for your application. All of the service providers for the application are configured in the config/app.php configuration file’s providers array. First, the register method will be called on all providers, then, once all providers have been registered, the boot method will be called.
Service providers are responsible for bootstrapping all of the framework’s various components, such as the database, queue, validation, and routing components. Since they bootstrap and configure every feature offered by the framework, service providers are the most important aspect of the entire Laravel bootstrap process.
Request Lifecycle
Dispatch Request
Once the application has been bootstrapped and all service providers have been registered, the Request will be handed off to the router for dispatching. The router will dispatch the request to a route or controller, as well as run any route specific middleware.
Service Container
The Laravel service container is a powerful tool for managing class dependencies and performing dependency injection. Dependency injection is a fancy phrase that essentially means this: class dependencies are “injected” into the class via the constructor or, in some cases, “setter” methods.
What are Laravel Contract’s ?
Laravel’s Contracts are nothing but a set of interfaces that define the core services provided by the Laravel framework.
Read more about laravel Contract’s
Explain Facades in Laravel ?
Laravel Facades provides a static like an interface to classes that are available in the application’s service container. Laravel self-ships with many facades which provide access to almost all features of Laravel ’s. Laravel facades serve as “static proxies” to underlying classes in the service container and provide benefits of a terse, expressive syntax while maintaining more testability and flexibility than traditional static methods of classes. All of Laravel’s facades are defined in the Illuminate\Support\Facades namespace. You can easily access a facade like so:
use Illuminate\Support\Facades\Cache;
Route::get(‘/cache’, function () {
return Cache::get(‘key’);
});
What are Laravel eloquent?
Laravel’s Eloquent ORM is simple Active Record implementation for working with your database. Laravel provide many different ways to interact with your database, Eloquent is most notable of them. Each database table has a corresponding “Model” which is used to interact with that table. Models allow you to query for data in your tables, as well as insert new records into the table.
Below is sample usage for querying and inserting new records in Database with Eloquent.
What are traits in Laravel?
PHP Traits are simply a group of methods that you want include within another class. A Trait, like an abstract class cannot be instantiated by itself.Trait are created to reduce the limitations of single inheritance in PHP by enabling a developer to reuse sets of methods freely in several independent classes living in different class hierarchies.
What is reverse routing in Laravel?
Laravel reverse routing is generating URL’s based on route declarations. Reverse routing makes your application so much more flexible. It defines a relationship between links and Laravel routes. When a link is created by using names of existing routes, appropriate Uri’s are created automatically by Laravel. Here is an example of reverse routing.
// route declaration
Route::get(‘login’, ‘users@login’);
Using reverse routing we can create a link to it and pass in any parameters that we have defined. Optional parameters, if not supplied, are removed from the generated link.
{{ HTML::link_to_action(‘users@login’) }}
It will automatically generate an Url like http://xyz.com/login in view.
List some default packages provided by Laravel 5.6 ?
Below are a list of some official/ default packages provided by Laravel
Cashier Envoy Passport Scout Socialite Horizon
Explain Bundles in Laravel?
In Laravel, bundles are also called packages. Packages are the primary way to extend the functionality of Laravel. Packages might be anything from a great way to work with dates like Carbon, or an entire BDD testing framework like Behat.In Laravel, you can create your custom packages too.
