我要在帖子标题中添加自定义字段，
我的帖子标题是"Marroon Five" 我的自定义字段是"release-year" 并且有价值"2017" .
因此，如何进行输出：Marroon Five (2017)
这是我搜索后发现的
add_action(\'save_post\', \'update_term_title\');
function update_term_title($post_id)
{
if(defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
return;
if(!current_user_can(\'edit_post\', $post_id))
return;
//Replace \'release-year\' with whatever your custom taxonomy slug is
$terms = wp_get_post_terms($post_id, \'release-year\');
if(empty($terms))
return;
$title = false;
foreach($terms as $term)
{
if($term->parent)
{
$parent = get_term($term->parent, \'release-year\');
$title = $term->name.\' \'.$parent->name;
break;
}
}
/*Default to first selected term name if no children were found*/
$title = $title ? $title : $terms[0]->name;
/*We must disable this hook and reenable from within
if we don\'t want to get caught in a loop*/
remove_action(\'save_post\', \'update_term_title\');
$update = array(
\'ID\'=>$post_id,
\'post_name\'=>sanitize_title_with_dashes($title),
\'post_title\'=>$title
);
wp_update_post($update);
add_action(\'save_post\', \'update_term_title\');
}
唯一的问题是，此代码将所有帖子标题替换为自定义字段值
"2017" 希望有人能修复这是我想要的返回输出
非常感谢。
SO网友:Jason Lawton
您可以编写一个函数来钩住标题的显示，然后在显示标题时，它将获取自定义字段的值并将其附加到标题。这样，您就不会每次保存帖子时都编辑/更改标题。
您可以这样做：
function append_year( $title ) {
global $post;
$terms = wp_get_post_terms( $post->ID, \'release-year\', array("fields" => "names") );
if ( count( $terms ) ) {
return $title . \'(\' . $terms[0] . \')\';
} else {
return $title;
}
}
add_filter( \'the_title\', array($this, \'append_title\' ) );
wp_get_post_terms 返回一个数组，您可以向其传递一个参数数组来配置所需的内容
see the wp_get_post_terms documentation.
上述代码改编自this other SO post about appending title text
