如何从WP_Options中的多维数组中检索多个值？

Question

我刚刚开始将数据存储在WP_Options中的多维数组中，我需要一些帮助来检索一些数据...

我的数据在下面，并存储为option_name“ my_category_fields”

我需要拉出一个类别ID的字符串，其中my_cat_hide设置为true。我在这里固定了功能。我该如何完成？

function get_hidden_cats()
{
$my_cats = get_option('ce4_category_fields');
    //how do I capture the list of category ids where my_cat_hide is 'true'?
    $my_hidden_cats = ?
    return $my_hidden_cats;
}

my_category_fields：

a:17:{
    i:20;a:1:{s:13:"my_cat_title";s:30:"Black Tea is Good for the Soul";}
    i:9;a:1:{s:13:"my_cat_title";s:58:"Herbal Chinese Tea is a spectacular blend of herbs and tea";}
    i:44;a:1:{s:13:"my_cat_title";s:24:"This is my 9th category!";}
    i:7;a:1:{s:13:"my_cat_title";s:0:"";}
    i:19;a:1:{s:13:"my_cat_title";s:0:"";}
    i:4;a:2:{s:13:"my_cat_title";s:28:"My test Title for Chai Tea 4";s:12:"my_cat_hide";N;}
    i:37;a:1:{s:13:"my_cat_title";s:0:"";}
    i:16;a:1:{s:13:"my_cat_title";s:0:"";}
    i:5;a:2:{s:13:"my_cat_title";s:0:"";s:12:"my_cat_hide";N;}
    i:6;a:1:{s:13:"my_cat_title";s:0:"";}
    i:8;a:1:{s:13:"my_cat_title";s:0:"";}
    i:3;a:1:{s:13:"my_cat_title";s:0:"";}
    i:10;a:1:{s:13:"my_cat_title";s:59:"Iced Tea: The Great Southern Choice for Cooling Refreshment";}
    i:36;a:1:{s:13:"my_cat_title";s:28:"Full title for this category";}
    i:38;a:2:{s:13:"my_cat_title";s:0:"";s:12:"my_cat_hide";s:4:"true";}
    i:39;a:2:{s:13:"my_cat_title";s:0:"";s:12:"my_cat_hide";s:4:"true";}
    i:40;a:2:{s:13:"my_cat_title";s:0:"";s:12:"my_cat_hide";s:4:"true";}
}

Answer 1

以下应该做到这一点：

function get_hidden_cats() {
    $my_cats = get_option('ce4_category_fields');

    $my_hidden_cats = array();
    foreach( $my_cats as $cat_id => $cat_attrs ) {
        if( 'true' == $cat_attrs['my_cat_hide'] )
            $my_hidden_cats[] = $cat_id;
    }
    $my_hidden_cats = implode( ',', $my_hidden_cats );

    return $my_hidden_cats;
}