好吧，有趣的问题。就我所研究的而言，在删除帖子时调用钩子将删除的帖子ID作为参数传递。在删除父页时，它工作得很好，但当您挂接一个函数时trashed_post 若要删除子页面，它将无法工作，因为每次它都会获得垃圾帖子id，这里它将是最近删除的子页面的id。所以它不会像预期的那样工作。

现在来看解决方案。在这里，我用一个SQL命令重写了您的函数，将子页面的post状态更改为trash-

function delete_post(){
    global $post;
    $deletepostlink= add_query_arg( \'frontend\', \'true\',   get_delete_post_link( get_the_ID() ) );
    if (current_user_can(\'edit_post\', $post->ID)) {
        echo \'<span><a class="post-delete-link" onclick="return  confirm(\\\'Are you sure to delete?\\\')" href="\' . $deletepostlink . \'">Delete this </a></span>\';
    }
}

//Redirect after delete post in frontend
add_action(\'trashed_post\',\'trash_redirection_frontend\');
function trash_redirection_frontend($post_id) {
    if ( filter_input( INPUT_GET, \'frontend\', FILTER_VALIDATE_BOOLEAN ) ) {
        $args = array(
            \'posts_per_page\' => -1,
            \'order\'=> \'ASC\',
            \'post_parent\' => $post_id,
            \'post_type\' => \'page\'
        );
        // Filter through all pages and find Portfolio\'s children
        $children = get_children( $args );
        global $wpdb;
        foreach($children as $child){
            $childs[$child->ID] = $child->ID;
        }
        $sql = "UPDATE {$wpdb->posts} SET post_status = \'trash\' WHERE ID IN (" . implode( \', \', $childs ) . ")";
        $wpdb->query($sql);
        wp_redirect( get_option(\'siteurl\').\'/\' );
        exit;
    }
}