如何在WordPress中以帖子类型插入附件并更新自定义字段

我有一个名为[‘notifications’]的自定义帖子类型, 其中[[notifications]]中的所有帖子都有一个名为[‘attachment’]的自定义字段。

• 我希望用户从前端将附件上传到库中
• 如果上传成功
• 获取附件的文件名
• 然后通过其ID更新自定义帖子类型[‘notifications’]中的帖子
• 将帖子中的自定义字段[‘attachment’]更新为文件名

自定义字段的meta_key为[‘_ct_text_57fc8ec4573cd’]

这就是我到目前为止

对于前端

<?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>

内置函数

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;
}

不知道我是否做对了。上面的代码已成功插入附件, 但未更新帖子类型[‘notifications’]中的自定义字段

#1

在update_post_meta查询之前, 你的函数中有一个return语句。尝试以下代码：

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;
}

另外我不确定你的代码中是否需要这些require_once-s, 因为在function.php中需要加载所有内容。