每个循环的 OpenCart 2.3 产品评论模式 JSON-LD？

Question

我并不是真正的程序员，我破产了，并试图通过在线商店赚钱。我正在使用 OpenCart 2.3.0.2 开设在线商店，并在启动前尝试对其进行 SEO 优化。这一次，我试图用结构化数据标记来改进它。由于我没有（目前）购买模块的经济能力，所以我自己做并学习东西是如何工作的。

我正在尝试为 OpenCart 2.3 的 Product 模块创建自己的架构，但在 Review 部分卡住了。 JSON-LD 是完全构建和测试的。

我尝试使用 JSON-LD 进行标记，从 this page 和 OpenCart 论坛了解到，这是有问题的代码的 sn-p（审查部分）：

"review": [
  <?php foreach($reviewss as $review) { ?>
  {
    "@type": "Review",
    "author": "<?php echo $review['author'];?>",
    "datePublished": "<?php echo $review['date_added'];?>",
    "description": "<?php echo $review['text'];?>",
    "name": "<?php echo $review['author'];?>",
    "reviewRating": {
    "@type": "Rating",
    "bestRating": "5",
    "ratingValue": "<?php echo $review['rating'];?>",
    "worstRating": "1"
    }
  } 
  <?php } ?>
]
}

产生输出：

  "review": [
  {
    "@type": "Review",
    "author": "A Parker",
    "datePublished": "16/12/2018",
    "description": "Wow! Product arrive yesterday and it's well packed. The product is well-designed.",
    "name": "A Parker",
    "reviewRating": {
    "@type": "Rating",
    "bestRating": "5",
    "ratingValue": "5",
    "worstRating": "1"
    }
  } #there should be a comma here after "}". 
  {
    "@type": "Review",
    "author": "David Lay",
    "datePublished": "15/12/2018",
    "description": "Great product! Works as advertised.",
    "name": "David Lay",
    "reviewRating": {
    "@type": "Rating",
    "bestRating": "5",
    "ratingValue": "5",
    "worstRating": "1"
    }
  } 
  ]
}


Here's the correct one. Tested using Google Structured Data Markup.


  "review": [
  {
    "@type": "Review",
    "author": "A Parker",
    "datePublished": "16/12/2018",
    "description": "Wow! Product arrive yesterday and it's well packed. The product is well-designed.",
    "name": "A Parker",
    "reviewRating": {
    "@type": "Rating",
    "bestRating": "5",
    "ratingValue": "5",
    "worstRating": "1"
    }
  },
  {
    "@type": "Review",
    "author": "David Lay",
    "datePublished": "15/12/2018",
    "description": "Great product! Works as advertised.",
    "name": "David Lay",
    "reviewRating": {
    "@type": "Rating",
    "bestRating": "5",
    "ratingValue": "5",
    "worstRating": "1"
    }
  } 
  ]
}

我不确定它实际上叫什么，我认为是 - LOOP 问题。应该有一个逗号来分隔每个评论帖子的评论。如果只有 1 条评论，则代码可以正常工作。

应该有插入逗号的条件，比如如果review超过1则插入逗号，如果没有则不插入逗号。那么当然，最后一项不应该有逗号。

我一直在努力解决这个问题。我不懂PHP，但我通过阅读论坛努力尝试，关于循环和if/then条件，foreach等主题。但几乎无法理解。

我不知道怎么问这个问题，也许如何在 OpenCart 2.3 中为 JSON-LD Schema 循环产品评论帖子？ 非常感谢任何帮助。

Answer 1

为什么不使用json_encode()？

JSON-LD Product 架构看起来完全不同：

<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "Product",
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "3.5",
    "reviewCount": "11"
  },
  "description": "0.7 cubic feet countertop microwave. Has six preset cooking categories and convenience features like Add-A-Minute and Child Lock.",
  "name": "Kenmore White 17\" Microwave",
  "image": "kenmore-microwave-17in.jpg",
  "offers": {
    "@type": "Offer",
    "availability": "http://schema.org/InStock",
    "price": "55.00",
    "priceCurrency": "USD"
  },
  "review": [{
      "@type": "Review",
      "author": "Ellie",
      "datePublished": "2011-04-01",
      "description": "The lamp burned out and now I have to replace it.",
      "name": "Not a happy camper",
      "reviewRating": {
        "@type": "Rating",
        "bestRating": "5",
        "ratingValue": "1",
        "worstRating": "1"
      }
    }, {
      "@type": "Review",
      "author": "Lucas",
      "datePublished": "2011-03-25",
      "description": "Great microwave for the price. It is small and fits in my apartment.",
      "name": "Value purchase",
      "reviewRating": {
        "@type": "Rating",
        "bestRating": "5",
        "ratingValue": "4",
        "worstRating": "1"
      }
  }]
}
</script>

例如：

$data = (object) array(
    "@context" => "http://schema.org",
    "@type" => "Product",
    "aggregateRating" => (object) array(
        "@type": "AggregateRating",
        "ratingValue" => "3.5",
        "reviewCount" => "11"
    ),
    "description" => "0.7 cubic feet countertop microwave. Has six preset cooking categories and convenience features like Add-A-Minute and Child Lock.",
    "name" => "Kenmore White 17\" Microwave",
    "image"=> "kenmore-microwave-17in.jpg",
    "offers" => (object) array(
        "@type": "Offer",
        "availability": "http://schema.org/InStock",
        "price": "55.00",
        "priceCurrency": "USD"
    ),
    "review" => array()
);

foreach($reviews as $review) {
    array_push($data->review, $review);
}

echo '<script type="application/ld+json">';
echo json_encode($data);
echo '</script>';

另见structured data testing tool。

Answer 2

试试这个

"review": [

  <?php foreach($reviews as $key => $review); { ?>
  {
    "@type": "Review",
    "author": "<?php echo $review['author'];?>",
    "datePublished": "<?php echo $review['date_added'];?>",
    "description": "<?php echo $review['text'];?>",
    "name": "<?php echo $review['author'];?>",
    "reviewRating": {
    "@type": "Rating",
    "bestRating": "5",
    "ratingValue": "<?php echo $review['rating'];?>",
    "worstRating": "1"
    }
  } 
  <?php if ($key != (count($reviews) - 1)){ ?>,<?php } ?><?php } ?>
]
}