DWQA QuestionsCategory: LaravelWhat new in laravel 5.6 ?
kundan roy asked 4 years ago

Single Server Task Scheduling
If you have a task scheduler running on multiple servers, the task will run on each server. You can indicate that a task should only run on one of those servers with the onOneServer() method:

$schedule->command('report:generate')
    ->fridays()
    ->at('17:00')
    ->onOneServer();

Note: you must use the memcached or redis cache driver as the default application cache driver to take advantage of single server task scheduling in the Laravel 5.6 release.
Dynamic Rate Limiting
Laravel 5.6 introduces dynamic rate limiting that gives you more flexibility and makes it possible to easily rate limit on a per-user basis:

Route::middleware('auth:api', 'throttle:rate_limit,1')
    ->group(function () {
        Route::get('/user', function () {
            //
        });
    });

In the above example, the rate_limit is an attribute of the App\User model to determine the number of requests allowed in the given time limit.
Broadcast Channel Classes
You can now use channel classes in your routes/channels.php file instead of using closures.
To generate a new channel class, Laravel 5.6 provides a new make:channelcommand:

php artisan make:channel OrderChannel

You register your channel in the routes/channels.php file like so:

use App\Broadcasting\OrderChannel;

Broadcast::channel('order.{order}', OrderChannel::class);

API Controller Generation
You can now generate a resource controller for APIs that will exclude the unnecessary create and edit actions, which only apply to resource controllers returning HTML. To generate a resource controller, use the --api flag:

php artisan make:controller API/PhotoController --api

Eloquent Date Casting
You can individually customize the format of Eloquent date and datetime casting:

protected $casts = [
    'birthday' => 'date:Y-m-d',
    'joined_at' => 'datetime:Y-m-d H:00',
];

This format is used on model serialization to an array or JSON data.
Blade Component Aliases
You can now alias blade components for more convenient access. For example, if you store a component at resources/views/components/alert.blade.php you can use the component() method to alias it to a shorter name:

Blade::component('components.alert', 'alert');

You can then render it with the defined alias:

@component('alert')
    <p>This is an alert component</p>
@endcomponent

Argon2 Password Hashing
Laravel 5.6 supports a new password hashing algorithm for PHP 7.2+. You can control which hashing driver is used by default in the new config/hashing.phpconfiguration file.
You can learn more in our article about Laravel 5.6 support for the Argon2i hashing algorithm.
UUID Methods
Two new methods are now available in the Illuminate\Support\Str class for generating Universal Unique Identifiers (UUID):

// The methods return a Ramsey\Uuid\Uuid object

return (string) Str::uuid();

return (string) Str::orderedUuid();

The orderedUuid() method will generate a timestamp first UUID for easier and more efficient database indexing.
Collision
We recently wrote about Collision coming to Laravel 5.6 as a dev dependency, providing beautiful error reporting in the console:
Collision Package in Laravel 5.6
Bootstrap 4
All of the frontend scaffolding and example Vue component now use Bootstrap 4. We have covered Bootstrap 4 while in beta, and even created a Bootstrap 4 Laravel preset. It’s great to see Bootstrap 4 stable shipping with Laravel 5.6!
Learning More About Laravel 5.6
To upgrade your Laravel installation to v5.6, reference the upgrade guide. Laravel strives to make updating your application between major releases as short as possible. The upgrade from 5.5 to 5.6 is estimated to take between 10-30 minutes. Obviously, your mileage will vary based on your application.