php – 从WordPress取消注册自定义帖子类型

我正在尝试删除通过Wordpress中的其他主题设置的自定义帖子类型,现在所有这些帖子都分配给了post_type的投资组合.经过大量的搜索,我找到了下面的代码,但它似乎没有用.我尝试将它添加到新主题和旧主题functions.php.

我想删除post_type并将帖子分类并显示为普通帖子.我认为我正在做的是正确的,但似乎无法让它工作 – 我已经发布了自定义帖子类型的代码和取消注册分配给它的帖子的代码.

用于注销帖子类型的代码

if ( ! function_exists( 'unregister_post_type' ) ) :
function unregister_post_type() {
global $wp_post_types;
if ( isset( $wp_post_types[ 'portfolio' ] ) ) {
    unset( $wp_post_types[ 'portfolio' ] );
    return true;
}
return false;
}
endif;

add_action('init','unregister_post_type');

注册帖子类型的代码

register_post_type( 'portfolio',array(
        'labels' => array(
             'name' => __('Portfolio Items'),'singular_name' => __('Portfolio Item'),'add_new_item' => __('Add New Portfolio Item'),'edit_item' => __('Edit Portfolio Item'),'new_item' => __('New Portfolio Item'),'view_item' => __('View Portfolio Item'),'search_items' => __('Search Portfolio Items'),'not_found' => __('No portfolio items found'),'not_found_in_trash' => __('No portfolio items found in Trash')
        ),'public' => true,'show_ui' => true,'hierarchical' => false,'menu_position' => 7,//'rewrite' => array('slug' => 'portfolio'),'rewrite' => true,'_built_in' => false,'taxonomies' => array( 'post_tag','category','portfolio_tag','portfolio_category','client'),'supports' => array( 'title','editor','author','thumbnail','excerpt','trackbacks','custom-fields','comments','revisions')
    )
);

function delete_post_type(){
  unregister_post_type( 'portfolio' );
}
add_action('init','delete_post_type',100);