$this 包含在这个 SLIM 代码中的哪个对象引用？

Question

我正在尝试使用 SLIM 的树枝视图渲染一个简单的 HTML 视图。我想知道当我使用 get() 函数进行路由时

//Get container
$container = $app->getContainer();

//Register Component on container

$container['view'] = function($container) {
    $view = new \Slim\Views\Twig('templates', [
    'cache' => false
    ]);

    $view->addExtension(new \Slim\Views\TwigExtension(
    $container['router'],
    $container['request']->getUri()
    ));

    return $view;

};

$app->get('/', function(Request $request, Response $response) {
    return $this->view->render($response, 'index.html');
});

$app->run();

那么$this包含了哪个对象引用。请帮我澄清一下。谢谢

Answer 1

$this是slim的依赖注入容器：Slim\Container

在闭包的 DeferredCallable, you can see that slim uses the bindTo 函数中设置 $this 实例。

Answer 2

$this 指向创建闭包的class

class a {
    public function test(){
       //closure is defined in the class
       return function(){
            print_r($this);//so you have access to $this
       };
    }
}

$a = new a();
$a->test();

在您的示例中，您使用的是 https://www.slimframework.com/ 并且它不是以这种方式工作的。但它基本上适用于 php.

Answer 3

来自 SlimFramework docs :

Note inside the group closure, $this is used instead of $app. Slim binds the closure to the application instance for you, just like it is the case with route callback binds with container instance.

inside group closure, $this is bound to the instance of Slim\App

inside route closure, $this is bound to the instance of Slim\Container

$this 包含在这个 SLIM 代码中的哪个对象引用？

Which object reference does $this contain in this SLIM code?

php

slim

twig