php - 保存帖子类型时运行 在 WordPress 中运行函数

Question

我正在尝试在 WordPress 中添加操作，以便在保存“fep_message”类型的帖子时，我检查是否有与 post_parent ID 关联的任何“_fep_delete_by_”键，然后从 wp_post_meta 表中删除它们。这是我为此构建的代码，但它不起作用:

add_action('publish_post', 'undelete_thread');
function undelete_thread($post_id, $post) {
    global $wpdb;
    if ($post->post_type = 'fep_message'){
        $participants = fep_get_participants( $post->post_parent );
        foreach( $participants as $participant ) 
        {
            $query ="SELECT meta_id FROM wp_postmeta WHERE post_id = %s and `meta_key` = '_fep_delete_by_%s'";
            $queryp = $wpdb->prepare($query, array($post->post_parent, $participant));
            if (!empty($queryp)) {
                delete_post_meta($queryp,'_fep_delete_by_' . $participant); 
            }
        }
    }
}

完成此任务的正确 Hook 是什么？

Answer 1

在 WordPress 中使用 save_post Hook 。您可以在这里找到更多信息

https://codex.wordpress.org/Plugin_API/Action_Reference/save_post

代码应更改为:

add_action('save_post', 'undelete_thread');

function undelete_thread($post_id) {
    global $wpdb;
    global $post; 

    if ($post->post_type = 'fep_message'){
        $participants = fep_get_participants( $post->post_parent );
        foreach( $participants as $participant ) 
        {
            $query ="SELECT meta_id FROM wp_postmeta WHERE post_id = %s and `meta_key` = '_fep_delete_by_%s'";
            $queryp = $wpdb->prepare($query, array($post->post_parent, $participant));
            if (!empty($queryp)) {
                delete_post_meta($queryp,'_fep_delete_by_' . $participant); 
            }
        }
    }
}