Laravel 5 – global Blade view variable available in all templates

Option 1:

You can use view::share() like so:

<?php namespace App\Http\Controllers;

use View;

//You can create a BaseController:

class BaseController extends Controller {

    public $variable1 = "I am Data";

    public function __construct() {

       $variable2 = "I am Data 2";


       View::share ( 'variable1', $this->variable1 );
       View::share ( 'variable2', $variable2 );
       View::share ( 'variable3', 'I am Data 3' );
       View::share ( 'variable4', ['name'=>'Franky','address'=>'Mars'] );
    }  

}

class HomeController extends BaseController {

    //if you have a constructor in other controllers you need call constructor of parent controller (i.e. BaseController) like so:

    public function __construct(){
       parent::__construct();
    }

    public function Index(){
      //All variable will be available in views
      return view('home');
    }

}

Option 2:
Use a composer:

1. Create a composer file at app\Composers\HomeComposer.php

NB: create app\Composers if it does not exists

<?php namespace App\Composers;

class HomeComposer
{

    public function compose($view)
    {
        //Add your variables
        $view->with('variable1',      'I am Data')
             ->with('variable2',      'I am Data 2');
    }
}

Then you can attached the composer to any view by doing this

<?php namespace App\Http\Controllers;

use View;

class HomeController extends Controller{


    public function __construct(){

        View::composers([
            'App\Composers\HomeComposer'  => ['home'] //attaches HomeComposer to home.blade.php
        ]);

    }

    public function Index(){
        return view('home');
    }

}

Option 3:
Add Composer to a Service Provider, In Laravel 5 I prefer having my composer in App\Providers\ViewServiceProvider

1. Create a composer file at app\Composers\HomeComposer.php

2. Add HomeComposer to App\Providers\ViewServiceProvider

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use View;
use App\Composers\HomeComposer;
use Illuminate\Support\Facades\Blade;

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

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        //add to all views
        view()->composer('*', HomeComposer::class);
        //add to only home view 
        //view()->composer('home', HomeComposer::class);
    }
}