我几天来一直在努力解决这个问题。。我用尽了所有的选择，因此需要一些新的想法。。我有一个页面模板，用于从wordpress前端发布/编辑2种不同的自定义帖子类型。

为了简单起见，这里我将这些自定义帖子类型命名为post\\u type\\u x和post\\u type\\u y。可以编辑这些帖子类型的页面名称将分别为page\\u x和page\\u y，并且这两个页面都被指定使用相同的模板。因此，模板页面的代码结构如下：

<?php
if (is_page(\'page_x\')) {
    $current_post_type = "post_type_x";

    some if statements to determine the $action variable according to the $_POST variables

        switch ($action) {
            case "...":                 
            .... break;         
            case "update_save":
            .... break;
        }

}  elseif (is_page(\'page_y\')) {
    $current_post_type = "post_type_y";

    some if statements to determine the $action variable according to the $_POST variables

        switch ($action) {
            case "...":                 
            .... break;         
            case "update_save":
            .... break;
        }

} else { ...
}
....
get_header(); ?>
....

<form action="<?php the_permalink(); ?>" method="post" name="post_adv_resp_form" enctype="multipart/form-data">
....
<input type="file" name="file-attachment" id="file-attachment" />
....
</form>
....

在“update\\u save”情况下，有这样一个代码：

case "update_save":
$post_id = update_post_of_custom_type($_POST[\'post_id\'],$post_title,$post_content,\'draft\');
if ($post_id != false) {
$file_upload = upload_file_of_custom_type($_FILES[\'file-attachment\'],$post_id,\'file-attachment\');   
... 
} break;

问题是：当我在page\\u x上进行测试时，“update\\u save”案例非常有效。upload\\u file\\u of\\u custom\\u type函数上载文件，更新post meta。但是，当我在page\\y上时，脚本上载文件，然后中断，不会更新post meta。我有一个白色的屏幕。尽管调试模式已打开，但屏幕上不会显示任何错误。当我检查apache日志时，我什么也没发现。。

function upload_file_of_custom_type($files,$post_id,$file_form_handler) {
    require_once(ABSPATH . "wp-admin" . \'/includes/file.php\');
    require_once(ABSPATH . "wp-admin" . \'/includes/media.php\');
    ... some controls ...

    $attach_id = media_handle_upload( $file_form_handler, $post_id, array( \'test_form\' => false ) ); $notice = "attach_id: ".$attach_id."upload is OK";                            
    if ($attach_id != false){                                      
        $file_load = update_post_meta($post_id,\'_wp_attached_file\',$attach_id);       
        if ($file_load == false) {
        $notice = __(\'An error occured while setting the post meta for the uploaded file.\', TDOMAIN);
        } elseif ($file_load == true) {
            $notice = \'OK\';
        }
    } else {
        $notice = __(\'An error occured while uploading the file.\', TDOMAIN);
    }
return $notice;
}

还有一个信息。。post\\u type\\u y作为post\\u type\\u y的子页发布。。我不知道这是否有什么区别。。关于问题可能是什么，有什么想法吗？

$attach_id = media_handle_upload( $file_form_handler, $post_id );                         
if ($attach_id != false){ // if the attachment is loaded, register them as post meta
    $file_load = update_post_meta($attach_id,\'_wp_attached_file\',$files[\'name\']);                                     
    $attach_data = wp_generate_attachment_metadata( $attach_id, ABSPATH."media/".$files[\'name\'] );
    $file_load = wp_update_attachment_metadata( $attach_id, $attach_data );
    if ($file_load == false) {
        $notice = __(\'An error occured while setting the post meta for the uploaded file.\', TDOMAIN);
    } elseif ($file_load == true) {
        $notice = \'OK\';
    }
} else {
    $notice = __(\'An error occured while uploading the file.\', TDOMAIN);
}