【问题标题】:How to save individual JSON data to a custom field?如何将单个 JSON 数据保存到自定义字段?
【发布时间】:2021-12-31 02:19:44
【问题描述】:

我在“https://stackoverflow.com/questions/70013277/getting-json-data-results-in-warning-htmlspecialchars-expects-parameter-1-to”上问了一个问题,基本上是在寻找一种方法从 url 获取 JSON 数据并将其保存为自定义字段。

到目前为止我的代码:

function post_extra_save( $post_id, $post){
global $pagenow;
// Work if on the editor
if ($pagenow == 'post.php') {
    // if post is a link in post format
    if ( has_post_format('link', $post_id)) {
        // get URL from post_content
        $url = get_post_field('post_content', $post_id);
        // fetch JSON data from Iframely
        $request = wp_remote_get( 'https://iframe.ly/api/iframely?url='. urlencode($url) .'&api_key='.get_field_object('api_key', 'option')['value'] );
        // encode the raw data
        $data_raw = json_encode( wp_remote_retrieve_body( $request ));
        // decode the data
        $data = json_decode($data_raw);
    }
}
}
add_action( 'save_post', 'post_extra_save', 10, 2 );

如果 JSON 数据如下所示:

{
"url": "https://www.technologyreview.com/2021/11/20/1039076/facebook-google-disinformation-clickbait/",
"meta": {
    "description": "The tech giants are paying millions of dollars to the operators of clickbait pages, bankrolling the deterioration of information ecosystems around the world.",
    "title": "How Facebook and Google fund global misinformation",
    "medium": "article",
    "amphtml": "https://www.technologyreview.com/2021/11/20/1039076/facebook-google-disinformation-clickbait/amp/",
    "date": "2021-11-20T17:50:00.000Z",
    "canonical": "https://www.technologyreview.com/2021/11/20/1039076/facebook-google-disinformation-clickbait/",
    "category": "Silicon Valley",
    "site": "MIT Technology Review",
    "author": "Karen Hao"
},

如何将“url”保存到名为“link_url”的自定义字段中?我尝试使用update_field('link_url', $data->url);,但没有任何反应。

【问题讨论】:

    标签: json wordpress wordpress-theming advanced-custom-fields


    【解决方案1】:

    我能够让它工作:

    // get URL from post_content
    $url = get_post_field('post_content', $post_id);
    // fetch JSON data from Iframely
    $request = wp_remote_get( 'https://iframe.ly/api/iframely?url='. urlencode($url) .'&api_key='.get_field_object('api_key', 'option')['value'] );
    // encode the raw data
    $data_raw = json_encode( wp_remote_retrieve_body( $request ));
    // decode the data
    $data = json_decode($data_raw);
    // decode it again
    $data2 = json_decode($data);
    // save the $data outut
    update_field('raw', $data);
    // save the url from $data2
    update_field('link_url', $data2->url);
    

    【讨论】:

      【解决方案2】:

      使用字段键代替字段名。

      $field = get_field_object('link_url');
      update_field($field["key"],$data->url);
      

      【讨论】:

      • 那行不通。
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