我在打印带有"php json ld"(github.com/digitalbazaar/php-json ld)的谷歌加速页面(AMP,www.ampproject.org)的正确JSONLD时遇到问题,如本例所述:github.com/ampproject/amphtml/blob/master/examples/metadata-examples/article-json-ld.AMP.html
更具体地说:我想知道如何使用php-json-ld:的函数添加"@type":"NewsArticle"
$doc = (object)array(
"https://schema.org/article" => 'Article',
"http://schema.org/name" => "Manu Sporny",
"http://schema.org/url" => (object)array("@id" => "http://manu.sporny.org/"),
"http://schema.org/image" => (object)array("@id" => "http://manu.sporny.org/images/manu.png")
);
$context = (object)array(
"article" => (object)array("https://schema.org/Article"),
"name" => "http://schema.org/name",
"homepage" => (object)array("@id" => "http://schema.org/url", "@type" => "@id"),
"image" => (object)array("@id" => "http://schema.org/image", "@type" => "@id")
);
//Print Json-LP
echo '<script type="application/ld+json">';
echo json_encode($jsonld_compacted,
JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
echo '</script>';
//Result:
<script type="application/ld+json">{
"@context": "http://schema.org",
"image": "http://manu.sporny.org/images/manu.png",
"name": "Manu Sporny",
"url": "http://manu.sporny.org/"
}</script>
有人能帮忙吗?
如果不需要转换JSON-LD,则不需要php-JSON-LD(或任何其他库)。将一个简单的关联数组序列化为JSON就足够了:
$data = array(
"@context" => "http://schema.org",
"@type" => "NewsArticle",
...
);
...
echo json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
非常感谢Markus Lanthaler的回答,这对我帮助很大。我对他的回答只有一点补充:
如果使用post_title之类的变量,则会自动对字符进行编码,这将导致格式不正确的JSON-LD。应对这种情况的方法是首先解码标题中的变量:
html_entity_decode(get_the_title($post->ID),ENT_QUOTES,'UTF-8');
在回显json_encode时,您还应该添加json_UNESCAPED_UNCODE,以便进行正确的编码。
所以你的回声应该是这样的:
echo json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);