Contoh penggunaan facade app::

1. Semak Environment :

if (App::isLocal())
{
    echo "environment=local\n";
}
elseif (App::runningUnitTests())
{
    echo "environment=testing\n";
}

atau

if (App::environment('production', 'staging'))
{
    echo "I'm on production or staging\n";
}
else
{
    echo "environment=", App::environment(), "\n";
}

atau

echo app('env');  

2. Semak samada Running di Console :

if (App::runningInConsole())
{
    echo "I'm in the console, baby!";
}

nota : laravel guna command php ini php_sapi_name() equals 'cli' 

3. Simpan nilai dalam  IoC Container :
- ini akan menjadikan nilai boleh dicapai bila2 masa dalam aplikasi tersebut.

$is_evening = (date('G') > 18) ? true : false;
App::instance('myapp.evening', $is_evening);

cara untuk capai :

App::make('myapp.evening') atau app('myapp.evening'). 

4. Lekatkan Interface kepada Implementation :

// Bind as an alias
App::bind('FooInterface', 'FooClass');

// Bind as a closure
App::bind('FooInterface', function($app)
{
    return new FooClass;
});

cara panggilan :

App::make('FooInterface') 

5. Objek dari IoC Container :

// Somewhere in your code
App::bind('myclass', function($app)
{
    return new MyCoolClass();
});

// Later
$myclass = App::make('myclass');

atau :

// Somewhere in your code
App::instance('mydata', $mydata);

// Later
$mydata = App::make('mydata');

- dapatkan :

// Somewhere in your code
App::singleton('mysingleton', 'stdClass');

// Later
$var = App::make('mysingleton');
$var->test = '123';

// Even later
$var2 = App::make('mysingleton');
echo $var2->test;

Lain2 contoh :

class Foo {
}
class Bar {
    protected $foo;
    public function __construct(Foo $foo)
    {
        $this->foo = $foo;
    }
}

// Construct Bar, automatically injecting a Foo instance
$bar = App::make('Bar');

App::bind('SomeInterface', 'SomeClassImplementingSomeInterface');

$var = App::make('SomeInterface');

atau 

$obj = app('stdClass'); // alias kepada App::make().

6. Daftar Filter sebelum Application :

App::before(function($request)
{
    if ($request->ajax())
    {
        // Returning a value will short-circut the life cycle and
        // keep any requests from being processed further
        return Response::json(['error' => 'AJAX not allowed']);
    }
    // No return value allows processing to continue as normal
});

biasa dalam fail :

app/filters.php

7. Daftar Filter selepas Application :

App::after(function($request, $response)
{
    // Capture last response
    $content = $response->getContent();
    File::put(storage_path().'/logs/last_response.txt', $content);
});

8. Daftar  Shutdown Callback :

App::shutdown(function()
{
    // gets called right before app quits.
});

dipangil semasa process akhir, sebelum keluar, biasa diguna untuk mematikan servis dan log.

9. Panggil  Shutdown Callbacks :

// Call registered callbacks
App::shutdown();

nota : keluar secara luarbiasa. 

10. Semak samada Applikasi di Booted :

// Usually in a service provider
if (App::isBooted())
{
    // Take action when booted
}

11. Daftar Booting atau Booted Callbacks :

App::booted(function($app)
{
    // Code to execute right before the app is booted.
});
App::booting(function($app)
{
    // Code to execute right after the app is booted.
})

12. Daftar HttpKernel Middleware :

App::middleware('MyApp\Middleware');

// 1 arg
App::middleware('MyApp\Middleware', array($arg1));

// 2+ args
App::middleware('MyApp\Middleware', array($arg1, $arg2)); 

13. Buang Middleware dari Application :

// Remove a class you've already registered
App::removeMiddleware('MyApp\Middleware');

// Remove the FrameGuard middleware
App::removeMiddleware('Illuminate\Http\FrameGuard'); 

14. Semak samada Application sedang dalam penyelenggaraan :

if (App::isDownForMaintenance())
{
    die("We're currently down for maintenance.");
}

15. Daftar mod penyelenggaraan :

App::down(function()
{
    return Response::view('maintenance.mode', array(), 503);
});

16. Dapatkan fail2 bootstrap :

echo App::getBootstrapFile();

17. Daftar Service Provider :

Pilihan 1 :

tambah dalam fail : app/config/app.php

'providers' => array(
    ...
    'MyApp\Providers\MyServiceProvider',
),

Pilahan 2 :

App::register('MyApp\Providers\MyServiceProvider');

// atau
$provider = new MyApp\Providers\MyServiceProvider;
App::register($provider);

18. Daftar  Finish Callback :

App::finish(function($request, $response)
{
    // Use request and/or response to do logging or some after
    // main processing stuff
});

daftarr dalam : app/start/global.php 

19. Pastikan Application sedia untuk Responses :

// In a service provider
if (App::readyForResponses())
{
    // Take action when booted
}

20. HttpExceptions :

- Bila tak jumpa :

App::abort(404);

atau

App::abort(404, 'User not found');

// Unauthorized
App::abort(401, 'Not authenticated');

// Forbidden
App::abort(403, 'Access denied');

// Internal Server Error
App::abort(500, 'Something bad happened');

// Not implemented
App::abort(501, 'Feature not implemented');

atau

App::abort(401, 'Not authenticated', ['WWW-Authenticate' => 'Basic']);

21. Daftar 404 Error Handler :

App::missing(function($exception)
{
    return View::make('not-found')->withMessage($exception->getMessage());
});

dalam : app/start/global.php. 

22. Daftar  Error Handler :

App::error(function($exception)
{
    die('ERROR: '.$exception->getMessage());
});

atau

App::error(function(RuntimeException $exception)
{
    return View::make('error', compact('exception'));
});

23. Daftar  "Last Chance" Error Handler :
- handle error hanya bila tiada yang handle

App::pushError(function($exception)
{
    die('ERROR: '.$exception->getMessage());
});

24. Daftar Error Handler for Fatal Errors :

App::fatal(function($exception)
{
    die('FATAL ERROR: '.$exception->getMessage());
});

Fatal errors adalah dari PHP : E_ERROR, E_CORE_ERROR, E_COMPILE_ERROR,  or E_PARSE. 

25. Dapatkan Application Locale :

if (App::getLocale() == 'en')
{
    echo "It's English!";
}

sama dengan :

Config::get('app.locale') 

26. Set Application Locale semasa :

// Change to Spanish
App::setLocale('es');

Nota : 

1. ubah app.locale .
2. Set locale translator.
3. locale.changed event dimualakan.

27. Dapatkan Default Request Class :

echo "Request Class = ", App::requestClass();

28. Set Request untuk persekiran Console :

App::setRequestForConsoleEnvironment();

29. Panggil  Static Method semasa Default Request Class :

$request = App::onRequest('createFromGlobals');

lain2 method :

• createFromBase(SymfonyRequest $request) - Create an Illuminate request from a Symfony instance.
• createFromGlobals() - Creates a new request with values from PHP's super globals.
• create($uri, $method, $parameters, $cookies, $files, $server, $content) - Creates a Request based on a given URI and configuration.
• setFactory($callable) - Sets a callable able to create a Request instance.
• setTrustedProxies(array $proxies) - Sets a list of trusted proxies.
• getTrustedProxies() - Gets the list of trusted proxies.
• setTrustedHosts(array $hostPatterns) - Sets a list of trusted host patterns.
• getTrustedHosts() - Gets the list of trusted host patterns.
• setTrustedHeaderName($key, $value) - Sets the name for trusted headers.
• getTrustedHeaderName($key) - Get the trusted proxy header name.
• normalizeQueryString($qs) - Normalize a query string.
• enableHttpMethodParameterOverride() - Enables support for the _method request parameter to determine the intended HTTP method.
• getHttpMethodParameterOverride() - Checks whether support for the _method request parameter is enabled.