How to share data between views in the laravel5.5 framework? Two ways to share data between views (with code)

laravelThere are two ways to share data between views in the framework. One is implemented using the view facade share() method, and the other is implemented using the view facade composer() method. So, there are two methods What exactly is the implementation of ? Let's take a look at the content of the next article.

First of all, one thing to note is: The View facade is used to access the underlying implementation of Illuminate\Contracts\View\Factory

View Facade share() method

Sometimes you need to share data fragments between all views. In this case, you can use the share method of the view facade.

1. Generally, I will create a basic controller BaseController.php under app\http\Controllers\xx.

<?php namespace App\Http\Controllers\ExtMan;

use Illuminate\Routing\Controller;

class BaseController extends Controller
{
    public function __construct(\Auth $auth)
    {
        $this->initViewShare();    //视图共享数据
    }
    /**
     *  视图共享数据方法
     */
    public function initViewShare()
    {
        view()->share('action_name',get_action_name()); //当前URL的方法器名
     }
}


//视图使用 
//共享视图一般都是在layout中
{{ $action_name }}

get_action_name() is a customized function.

tips:
Create app\Helpers\ExtmanFun.php, introduce autoload in composer.json

 "files":[
     "app/Helpers/ExtmanFun.php"
 ]

Run composer dump-autoload and it will be loaded automatically

2, call share() in the boot method of the AppServiceProvider service provider (or create a new provider)

<?php namespace App\Providers;
use View;
class AppServiceProvider extends ServiceProvider
{
    /**
     * 启动所有应用服务
     *
     * @return void
     */
    public function boot()
    {
        View::share(&#39;key&#39;, &#39;value&#39;);
        //也可使用
        view()->share('name','共享数据片段');
    }
}

ViewFacade composer() method

The view composer is a callback function or class method when the view is rendered. If you need to bind the view's data every time you render the view, such as user login information. You can use composer() to organize logic into a separate place.
In this example, we will register the view composer in the AppServiceProvider service provider.
The provider code is as follows:

<?php namespace App\Providers;

#use Illuminate\Support\Facades\View;
use Illuminate\Support\ServiceProvider;
class AppServiceProvider extends ServiceProvider
{
    public function boot()
    {
        // 使用基于类方法
        // 第一个参数可以指定共享给那个视图,多个视图用数组，共享到全部视图可以用 *
        // 或者某个目录下所有视图 
        view()->composer(
            //'*', 'App\Http\ViewComposers\AuthComposer'
            //['extman.home, welcome'], 'App\Http\ViewComposers\AuthComposer'
            ['extman.*'], 'App\Http\ViewComposers\AuthComposer'
        );

        //使用基于回调函数
        view()->composer('*',function($view){
            $view->with('user',array('name'=>'test','avatar'=>'/path/to/test.jpg'));
        });
    }
other code
}

If you create a new service provider to include the view composer registration, you need Add this service provider to the providers array of the configuration file config/app.php

The view composer has been registered so far, and the AuthComposer@compose method will be executed every time all views in the extman directory are rendered.
Define the view composer class App\Http\ViewComposers\AuthComposer.php

<?php namespace App\Http\ViewComposers;

use Illuminate\View\View;
use Illuminate\Repositories\UserRepository;

class AuthComposer
{
    protected $users;

    public function __construct(UserRepository $users)
    {
        // 依赖注入通过服务容器自动解析...
        $this->users = $users;
    }

    //绑定数据到视图
    public function compose(View $view)
    {
        $user_info = \Auth::user();
        $view->with('motto', $user_info);
        $view->with('count', $this->users->count());
    }
}

Before the view is rendered, the compose method of the AuthComposer class is called, and the Illuminate\View\View instance is injected into this method, thus You can use its with method to bind data to the view.

All view composers will be resolved through the service container, so you can type hint the dependencies that need to be injected in the constructor of the view composer.

Recommended related articles:

Detailed explanation of shared data between Laravel views and view Composer_php examples

##Laravel 5 framework learning direction View transfers data, laravel framework

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