事实上，Wordpress提供了一个很好的挂钩，您可以从发布的帖子中获取数据，更多信息，请遵循以下示例：https://codex.wordpress.org/Plugin_API/Action_Reference/publish_post自定义字段的简单更新示例：

/* Do something with the data entered */
add_action( \'save_post\', \'myplugin_save_postdata\' );

/* When the post is saved, saves our custom data */
function myplugin_save_postdata( $post_id ) {

// First we need to check if the current user is authorised to do this action. 
if ( \'page\' == $_POST[\'post_type\'] ) {
if ( ! current_user_can( \'edit_page\', $post_id ) )
    return;
} 
else {
if ( ! current_user_can( \'edit_post\', $post_id ) )
    return;
 }

$mydata = \'something\'; // Do something with $mydata 

update_post_meta( $post_id, \'_my_meta_value_key\', $mydata );
}