在 Slim Framework 中管理跨多个路由共享的数据的最佳方法是什么？

Question

假设您有 3 个页面、3 个路由（/index、/about、/contact）和一个显示从数据库检索的项目列表的共享 header .

在 Slim 中是否有更好的方法来检索所有 pages/routes 的这些项目，以传递给相应的模板，而不是基本上为每个路由控制器方法复制代码？

例如，除此之外还有其他方式吗？

$app->get('/', function ($request, $response, $args) {
    return $this->view->render($response, 'index.twig', [
        'items' => /* retrieve items from database */
    ]);
});

$app->get('/about', function ($request, $response, $args) {
    return $this->view->render($response, 'about.twig', [
        'items' => /* retrieve items from database (duplicate code) */
    ]);
});

$app->get('/contact', function ($request, $response, $args) {
    return $this->view->render($response, 'contact.twig', [
        'items' => /* retrieve items from database (duplicate code) */
    ]);
});

Answer 1

一种选择是将这些项目作为全局变量添加到 TwigEnvironment，以便它们在每个模板中都可用。

首先需要给Twig环境添加全局变量：

// A simple items provider which helps you generate a list of items
// You can change this to something that reads the items from database, etc.
class ItemsProvider {
    public function getItems()
    {
        return ['item 1', 'item 2', 'item 3', 'item-4', ];
    }
}

// Set view in Container
$container->set('view', function($c) {
    $twig = Twig::create('<path-to-tiwg-templates'>);
    // get items from items-provider and add them as global `items` variable
    // to all twig templates
    $twig->getEnvironment()->addGlobal('items', $c->get('items-provider')->getItems());
    return $twig;
});

// set sample items, you can modifiy this 
$container->set('items-provider', function($c){
    return new ItemsProvider;
});

现在变量 items 可用于每个 Twig 模板，无需将其显式传递给 render 方法：

layout.twig:

These are some items available in every twig template:<br>
<ul>
{% for item in items%}
    <li>{{ item }}</li>
{% endfor %}
</ul>
<br>
And this is some page specific content:<br>
{% block content %}
    {{ pagecontent }}
{% endblock %}

所有三个模板 index.twig、about.twig 和 contact.twig 都可以扩展 layout.twig:

{% extends 'layout.twig' %}

路由定义 layout.twig:

中使用的同一变量的每个路由具有不同的值

$app->get('/index', function($request, $response, $args){
    return $this->get('view')->render($response, 'index.twig', ['pagecontent' => 'This is some content for /index only']);
});

$app->get('/about', function($request, $response, $args){
    return $this->get('view')->render($response, 'about.twig', ['pagecontent' => 'You can have custom content for /about']);
});

$app->get('/contact', function($request, $response, $args){
    return $this->get('view')->render($response, 'contact.twig', ['pagecontent' => '...and /contact as well']);
});

Answer 2

共享相同数据的路由也可以使用相同的响应器来呈现内容。

伪例子：

<?php

namespace App\Responder;

use Psr\Http\Message\ResponseInterface;
use Slim\Views\Twig;

final class Responder
{
    private $twig;

    public function __construct(Twig $twig)
    {
        $this->twig = $twig;
    }

    public function render(ResponseInterface $response, string $template, array $data = []): ResponseInterface
    {
        $shared = ['item1', 'item2'];
        $data = array_replace(shared, $data);

        return $this->twig->render($response, $template, $data);
    }
}

用法

$this->responder->render($response, 'index.twig', ['page' => 'content']);

或...

use App\Responder\Responder;

// ...

$app->get('/index', function($request, $response, $args){
    return $this->get(Responder::class)->render($response, 'index.twig', ['pagecontent' => 'This is some content for /index only']);
});

$app->get('/about', function($request, $response, $args){
    return $this->get(Responder::class)->render($response, 'about.twig', ['pagecontent' => 'You can have custom content for /about']);
});

$app->get('/contact', function($request, $response, $args){
    return $this->get(Responder::class)->render($response, 'contact.twig', ['pagecontent' => '...and /contact as well']);
});

在 Slim Framework 中管理跨多个路由共享的数据的最佳方法是什么？

What is the best way to manage data shared across multiple routes in Slim Framework?

php

slim