WordPress 媒體檔案新增重新關聯附加選項的方法

WordPress 允許您將一個媒體檔案關聯附加到一篇文章，但預設不能修改關聯，本教程將新增一個可以修改媒體檔案關聯附加的選項。
將下面程式碼新增到當前主題的 functions.php 檔案:
add_filter("manage_upload_columns", 'upload_columns');
add_action("manage_media_custom_column", 'media_custom_columns', 0, 2);
   
function upload_columns($columns) {
    unset($columns['parent']);
    $columns['better_parent'] = "Parent";
    return $columns;
}
function media_custom_columns($column_name, $id) {
    $post = get_post($id);
    if($column_name != 'better_parent')
        return;
        if ( $post->post_parent > 0 ) {
            if ( get_post($post->post_parent) ) {
                $title =_draft_or_post_title($post->post_parent);
            }
            ?>
            <strong><a href="http://<?php%20echo%20get_edit_post_link(br%20/$post->post_parent%20);%20?>"><?php echo $title
?></a></strong>, <?php echo get_the_time(__('Y/m/d'));
?>
            <br />
            <a
onclick="findPosts.open('media[]','<?php echo $post->ID
?>');return false;" href="#the-list"><?php _e('Re-Attach');
?></a>
            <?php
        } else {
            ?>
            <?php _e('(Unattached)'); ?><br />
            <a
onclick="findPosts.open('media[]','<?php echo $post->ID
?>');return false;" href="#the-list"><?php _e('Attach');
?></a>
            <?php
        }
}