如何在 Wordpress 的 post 类型中插入附件和更新自定义字段

Question

我有一个名为 ['notifications'] 的自定义 post 类型和一个名为 ['attachment'] 的自定义字段，用于 ['notifications' 中的所有 post ].

我希望用户从前端上传一个附件到库中
如果上传成功
获取附件的文件名
然后在自定义 post 类型 ['notifications'] 中通过其 ID
将 post 中的自定义字段 ['attachment'] 更新为文件名

自定义字段的 meta_key 是 ['_ct_text_57fc8ec4573cd']

这是我目前所拥有的

前端

<?php
   if (isset($_POST['upload'])) {
      if (!empty($_FILES)) {
         $file = $_FILES['file'];
         $attachment_id = upload_user_file($file);
      }
   }
?>

<form action="" enctype="multipart/form-data" method="post">
   <input name="file" type="file">
</form>

内部 FUNCTIONS.PHP

function upload_user_file($file = array()) {

   require_once(ABSPATH. 'wp-admin/includes/admin.php'); 

   $file_return = wp_handle_upload($file, array('test_form' => false));

   if (isset($file_return['error']) || isset($file_return['upload_error_handler'])) {
       return false;
   } else {

       $filename = $file_return['file'];

       $post_ID_attachment = 33;

       $attachment = array('post_mime_type' => $file_return['type'],
           'post_title' => $post_ID_attachment, 
           'post_content' => '',
           'post_status' => 'inherit', 
           'guid' => $file_return['url']
       );

       $attachment_id = wp_insert_attachment($attachment, $file_return['url']);

       require_once(ABSPATH. 'wp-admin/includes/image.php');

       $attachment_data = wp_generate_attachment_metadata($attachment_id, $filename);

       wp_update_attachment_metadata($attachment_id, $attachment_data);

       if (0 < intval($attachment_id)) {
           return $attachment_id;
       }

       /* UPDATE ATTACHMENT BELOW*/
       update_post_meta($post_ID_attachment, '_ct_text_57fc8ec4573cd', $filename);
   }
      return false;
}

不确定我是否做对了。上面的代码成功插入了附件，但它没有更新 post 类型 ['notifications']

中的自定义字段

Answer 1

您的函数中有一个 return 语句，在 update_post_meta 查询之前。试试下面的代码：

function upload_user_file($file = array()) {

    require_once(ABSPATH. 'wp-admin/includes/admin.php'); 

    $file_return = wp_handle_upload($file, array('test_form' => false));

    if (isset($file_return['error']) || isset($file_return['upload_error_handler'])) {
       return false;
    } else {

        $filename = $file_return['file'];

        $post_ID_attachment = 33;

        $attachment = array('post_mime_type' => $file_return['type'],
          'post_title' => $post_ID_attachment, 
          'post_content' => '',
          'post_status' => 'inherit', 
          'guid' => $file_return['url']
       );

       $attachment_id = wp_insert_attachment($attachment, $file_return['url']);

       require_once(ABSPATH. 'wp-admin/includes/image.php');

       $attachment_data = wp_generate_attachment_metadata($attachment_id, $filename);

       wp_update_attachment_metadata($attachment_id, $attachment_data);

       /* UPDATE ATTACHMENT BELOW*/
       update_post_meta($post_ID_attachment, '_ct_text_57fc8ec4573cd', $filename);

       if (0 < intval($attachment_id)) {
           return $attachment_id;
       }
   }
   return false;
}

此外，我不确定您的代码中是否需要这些 require_once-s，因为它在 function.php 中，所有内容都应该加载。

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