php - 如何在for循环中打印所有结果？

Question

在我的代码中，我尝试打印“montag”IS“geschlossen”的所有结果。它可以工作，但我必须在 var_dump() 中打印它，否则我会收到错误。

我的问题是，如何循环返回结果？我想用 Doctrine、Symfony 和 twig 来制作这个(PDO 示例):

foreach ($pdo->query($sql) as $row) {
   echo $row['value1']."<br />";
   echo $row['value2']."<br />";
}

<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\HttpFoundation\Response;
use App\Entity\Offnungszeiten;
use Doctrine\ORM\EntityManagerInterface;

class OffnungsController extends AbstractController
{
    /**
     * @Route("/")
     */
    public function index(EntityManagerInterface $em)
    {
        $repository = $em->getRepository(Offnungszeiten::class);
        /** @var Offnungszeiten $open */
        $open = $repository->findOneBy(['id' => 3]);
        if (!$open) {
            throw $this->createNotFoundException(sprintf('Not Found Exception - SQL findOneBy() is undefined'));
        }


        $repository = $this->getDoctrine()->getRepository(Offnungszeiten::class);

        $products = $repository->findBy(
            ['montag' => 'Geschlossen'],
            ['id' => 'ASC']
        );

        $products = $repository->findAll();

    $result = var_dump($products);



        $response = $this->forward('App\Controller\IndexController::index', [
            'open' => $open,
            'productsrt' => $result
        ]);
        return $response;
    }
}

在 twig 中，我尝试像这样打印它:

    {% for productsrt in productsrt %}
        {{ productsrt }}
    {% endfor %}

IndexController.php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Routing\Annotation\Route;

class IndexController extends AbstractController
{
    public function index($open, $productsrt)
    {
        return $this->render('index/index.html.twig', [
            'controller_name' => 'IndexController',
            'pagetype' => 'index',
            'pageurl' => "https://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]",
            'open' => $open,
            'productsrt' => $productsrt
        ]);
    }

它打印:

array(2) { [0]=> 对象(App\Entity\Offnungszeiten)#490 (8) { ["id":"App\Entity\Offnungszeiten":private]=> int(3 ) ["montag":"App\Entity\Offnungszeiten":private]=> 字符串(11) "Geschlossen"["dienstag":"App\Entity\Offnungszeiten":private]=> 字符串(22) "09.00 Uhr - 18.00 Uhr"["mittwoch":"App\Entity\Offnungszeiten":private]=> string(22) "09.00 Uhr - 18.00 Uhr"["donnerstag":"App\Entity\Offnungszeiten":private]=> string( 22) "09.00 Uhr - 20.00 Uhr"["freitag":"App\Entity\Offnungszeiten":private]=> string(22) "09.00 Uhr - 18.00 Uhr"["samstag":"App\Entity\Offnungszeiten": private]=> string(21) "09.00 Uhr - 13.00 Uhr"["sonntag":"App\Entity\Offnungszeiten":private]=> string(11) "Geschlossen"} [1]=> 对象(App\Entity\Offnungszeiten)#493 ...等等。

但我无法将其“重新格式化”为普通数组或循环

我收到错误

An exception has been thrown during the rendering of a template ("Catchable Fatal Error: Object of class App\Entity\Offnungszeiten could not be converted to string").

如果我在没有var_dump()的情况下尝试过

我希望这个问题是可以理解的并且你可以帮助我!谢谢!

Answer 1

您的错误表明该对象无法转换为字符串。也许您应该使用进行字符串转换？

     /**
     * To string casting
     *
     * @return string
     */
    public function __toString(): string
    {
        return (string)$this->name;
    }

将其添加到您的实体中。或者使用

    {% for productsrt in productsrt %}
        {{ productsrt.name }}
    {% endfor %}

在你的 Controller 中你应该发送$products，你不需要使用var_dump()

$products = $repository->findAll();

        $response = $this->forward('App\Controller\IndexController::index', [
            'open' => $open,
            'productsrt' => $products
        ]);
        return $response;