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();????//視圖共享數(shù)據(jù)
????}
????/**
?????*??視圖共享數(shù)據(jù)方法
?????*/
????public?function?initViewShare()
????{
????????view()->share('action_name',get_action_name());?//當(dāng)前URL的方法器名
?????}
}


//視圖使用?
//共享視圖一般都是在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
{
    /**
     * 啟動(dòng)所有應(yīng)用服務(wù)
     *
     * @return void
     */
    public function boot()
    {
        View::share(&#39;key&#39;, &#39;value&#39;);
        //也可使用
        view()->share(&#39;name&#39;,&#39;共享數(shù)據(jù)片段&#39;);
    }
}

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()
    {
        // 使用基于類(lèi)方法
        // 第一個(gè)參數(shù)可以指定共享給那個(gè)視圖,多個(gè)視圖用數(shù)組，共享到全部視圖可以用 *
        // 或者某個(gè)目錄下所有視圖 
        view()->composer(
            //&#39;*&#39;, &#39;App\Http\ViewComposers\AuthComposer&#39;
            //[&#39;extman.home, welcome&#39;], &#39;App\Http\ViewComposers\AuthComposer&#39;
            [&#39;extman.*&#39;], &#39;App\Http\ViewComposers\AuthComposer&#39;
        );

        //使用基于回調(diào)函數(shù)
        view()->composer(&#39;*&#39;,function($view){
            $view->with(&#39;user&#39;,array(&#39;name&#39;=>&#39;test&#39;,&#39;avatar&#39;=>&#39;/path/to/test.jpg&#39;));
        });
    }
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)
    {
        // 依賴注入通過(guò)服務(wù)容器自動(dòng)解析...
        $this->users = $users;
    }

    //綁定數(shù)據(jù)到視圖
    public function compose(View $view)
    {
        $user_info = \Auth::user();
        $view->with(&#39;motto&#39;, $user_info);
        $view->with(&#39;count&#39;, $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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