我正在尝试构建我的第一个无框架 PHP 应用程序,并且正在关注本教程。我对教程中描述的一些概念相对较新。尽管如此,我还是决定使用PHP-DI作为依赖注入器,而不是建议的(rdlowrey/auryn)。
除了文件Bootstrap.php
(和文件Dependencies.php
:
<?php declare(strict_types = 1);
require(__DIR__ . '/../vendor/autoload.php');
...
$container = include('Dependencies.php');
$request = $container->make('Http\HttpRequest');
$response = $container->make('Http\HttpResponse');
...
switch ($routeInfo[0]) {
...
case \FastRoute\Dispatcher::FOUND:
$className = $routeInfo[1][0];
$method = $routeInfo[1][1];
$vars = $routeInfo[2];
$class = $container->make($className);
$class->$method($vars); // (**)
break;
}
echo $response->getContent(); // (*)
$class
Homepage
只能是只有一个方法 ( )的类的实例show()
,在 (**) 中调用:
class Homepage
{
private $request;
private $response;
private $renderer;
public function __construct(
Request $request,
Response $response,
Renderer $renderer
) {
$this->request = $request;
$this->response = $response;
$this->renderer = $renderer;
}
public function show() {
$data = [
'name' => $this->request->getParameter('name', 'stranger'),
];
$html = $this->renderer->render('Homepage', $data);
$this->response->setContent($html); // (***)
}
}
综上所述,应用程序返回一个 200 HTTP 响应,其主体为空 [此处 (*)],但如果我尝试在 (***) 之后打印 HTTP 响应的内容,我会得到正确的响应。这可能意味着 HttpResponse 类有两个不同的实例。(那正确吗?)
通过使用教程作者rdlowrey/auryn,使用该方法share()
在类之间共享相同的HttpReponse实例,如“原始”Dependencies.php
文件所示:
<?php declare(strict_types = 1);
use \Auryn\Injector;
...
$injector = new Injector;
$injector->alias('Http\Response', 'Http\HttpResponse');
$injector->share('Http\HttpResponse');
...
return $injector;
有没有办法使用 PHP-DI(使用 PHP 定义)获得相同的行为?
这是我的版本Dependencies.php
:
<?php declare(strict_types = 1);
$definitions = [
'Http\Request' => DI\create('Http\HttpRequest')->constructor(
$_GET, $_POST, $_COOKIE, $_FILES, $_SERVER),
'Http\HttpRequest' => function () {
$r = new Http\HttpRequest($_GET, $_POST, $_COOKIE, $_FILES, $_SERVER);
return $r;
},
'Http\Response' => DI\create('Http\HttpResponse'),
'Twig\Environment' => function () {
$loader = new Twig\Loader\FilesystemLoader(
dirname(__DIR__) . '/templates');
$twig = new Twig\Environment($loader);
return $twig;
},
'Example\Template\TwigRenderer' => function (Twig\Environment $renderer) {
return new Example\Template\TwigRenderer($renderer);
},
'Example\Template\Renderer' => DI\create(
'Example\Template\TwigRenderer')->constructor(
DI\get('Twig\Environment')),
];
$containerBuilder = new DI\ContainerBuilder;
$containerBuilder->addDefinitions($definitions);
$container = $containerBuilder->build();
return $container;