无法以编程方式更新媒体字段

如何解决无法以编程方式更新媒体字段

我为每个附件都有一个自定义字段，我正在尝试根据附件内容以编程方式更新此字段。该函数应该检查每个附件字段是否有匹配的关键字，如果有匹配项，它将增加变量 $filter_check。

这样做的目的是，与其在函数运行时检查每个规则，不如按 $filter_check 的值过滤帖子。例如，如果 $filter_check 等于 1，我知道没有匹配项。如果 $filter_check 大于 1，我知道至少有一个匹配项。

但是我下面的代码不起作用，我看不到任何更新，也不知道我出了什么问题。有人可以帮忙吗？

编辑：不清楚 - 当我调用下面的代码时，它破坏了网站，我收到 wordpress 错误消息。

// Set rules to define field data
      $filter_title = array("free","demo","clip") ;
      $filter_artist = array("","Test","UnkNown") ;
      $filter_album = array("UnkNown","Excluded") ;
      $filter_url = array(".m4a",".wav","high-deFinition") ;

  $filter_check = 1 ;  // Value of 1 means the attachment doesn't meet any rules

// This function searches an array
function strposa($haystack,$needle,$offset=0) {
    if(!is_array($needle)) $needle = array($needle);
    foreach($needle as $query) {
        if(strpos($haystack,$query,$offset) !== false) return true; // stop on first true result
    }
    return false;
}


// Define which posts to get
$query_post_args = array(
    'post_type'      => 'attachment','post_mime_type' => 'audio','post_status'    => 'inherit','posts_per_page' => - 1,'post_status'    => 'public'
) ;


// Create a new query to get an array of matching IDs
$query_audio_list = new WP_Query( $query_post_args );

// then get the matching posts in a loop
$list_post_items = array();
foreach ( $query_audio_list->posts as $id ) {
        if ( ! $id ) {
          continue; // exit when there are no more attachments to loop through
        }

    // Extract media details
    $media_title = get_the_title($id) ;
    $media_artist = wp_get_attachment_Metadata($id,'artist',true) ;
    $media_album = wp_get_attachment_Metadata($id,'album',true) ;
    $media_url = wp_get_attachment_url($id);

    // check if any of the strings include the keywords and increment filter check var if so
    if (strposa($media_title,$filter_title) == true) { $filter_check++ } ;
    if (strposa($media_artist,$filter_artist) == true) { $filter_check++ } ;
    if (strposa($media_album,$filter_album) == true) { $filter_check++ } ;
    if (strposa($media_url,$filter_url) == true) { $filter_check++ } ;
  
    // update the attachment with result of filter check variable and echo result
    $update['custom_filter'] = $filter_check ;
    if (wp_update_attachment_Metadata($id,$update) ) {
        echo $id . "has been updated<br>" ; } else {
        echo "There was an error updating ID: " . $id . "<br>" ;
    }
}