Laravel view composer

在某些情況下須傳遞參數底層樣板，例如想要將網頁瀏覽人數放在layouts.app，就需要使用view composer

可以使用 class 的方式傳入，或是閉包

創建 Providers

可以在App\View\Composers創建一個ProfileComposer檔案

<?php
namespace App\View\Composers;

class ProfileComposer
{
    public function compose($view)
    {
        $view->with('viewCount', 100);
    }
}

然後創建一個Providers檔案，利用class或是閉包方式傳入，View::composer第一個參數為blade位置名稱

指令: php artisan make:provider ViewServiceProvider

<?php

namespace App\Providers;

use App\View\Composers\ProfileComposer;
use Illuminate\Support\Facades\View;
use Illuminate\Support\ServiceProvider;

class ViewServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        // Using class based composers...
        View::composer('profile', ProfileComposer::class);

        // Using closure based composers...
        View::composer('profile', function ($view) {
            $view->with('viewCount', 100);
        });
    }
}

附加到多個樣板中

加到profile及dashboard的樣板中

use App\Views\Composers\MultiComposer;

View::composer(
    ['profile', 'dashboard'],
    MultiComposer::class
);

加到所有樣板

View::composer('*', function ($view) {
    //
});

新增服務

到config/app.php的providers數組中加入

App\Providers\ViewServiceProvider::class