In PHP, I used to define some variables in my header.php and use them in all my pages. How can I have something like that in Laravel?
I am not talking about View::share('xx', 'xx' );
Assume I want to have a variable which holds a number in it and I need this number inside all my controllers to calculate something.
Sounds like a good candidate for a configuration file.
Create a new one, let's call it calculations.php:
Laravel ~4ish:
app
config
calculations.php
Laravel 5,6,7+:
config
calculations.php
Then put stuff in the new config file:
<?php return [ 'some_key' => 42 ];
Then retrieve the config in your code somewhere (note the file name becomes a "namespace" of sorts for the config item):
echo Config::get('calculations.some_key'); // 42 in Laravel ~4
echo config('calculations.some_key'); // 42 in Laravel ~5,6,7+
config/calculations.php.
Set a property on the BaseController, which should be located in your controllers directory.
Your controllers should extend the BaseController class and thus inherit its properties.
You could use View Composers
And instead of using the boot method described in the docs you could use:
public function boot()
{
// Using class based composers...
view()->composer(
'*', 'App\Http\ViewComposers\ProfileComposer'
);
// Using Closure based composers...
view()->composer('*', function ($view) {
});
}
That would render whatever variables you declare with
$view->with('yourVariableName', 'yourVariableValue');
to all the views in your app.
Here is a full example of how I used this in one of my projects.
app/Providers/ComposerServiceProvider.php
<?php
namespace App\Providers;
use Illuminate\Support\ServiceProvider;
class ComposerServiceProvider extends ServiceProvider
{
/**
* Bootstrap the application services.
*
* @return void
*/
public function boot()
{
view()->composer(
'*', 'App\Http\ViewComposers\UserComposer'
);
}
/**
* Register the application services.
*
* @return void
*/
public function register()
{
//
}
}
app/Http/ViewComposers/UserComposer.php
<?php
namespace App\Http\ViewComposers;
use Illuminate\Contracts\View\View;
use Illuminate\Contracts\Auth\Guard;
class UserComposer
{
protected $auth;
public function __construct(Guard $auth)
{
// Dependencies automatically resolved by service container...
$this->auth = $auth;
}
public function compose(View $view)
{
$view->with('loggedInUser', $this->auth->user());
}
}
Just remember that because you declared a new service provider it needs to be included in the 'providers' array in config/app.php
You can define them in your app\Http\Controllers\Controller.php , for example:
<?php
namespace App\Http\Controllers;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Routing\Controller as BaseController;
class Controller extends BaseController
{
public $test = 'something';
use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
}
Then afterwards in all of your controllers, you can access this property by doing:
$this->test;
