Use code to generate config

I use this to generate configs:

PHP:

new Config($this->getDataFolder()."prefences.yml", Config::YAML, array....

In the array, I have this:

PHP:

                "items" => array(
                    array(1, 0, 2),
                    array(1, 0, 2)
                ),

But this generates this:
items:
- - 1
- 0
- 2
I want it to be like this:
items:
- "295:0:1"
- "458:0:1"
How do I do that?

Instead of creating a array enclose does values into a string. Then if you want to split them just use explode

How? Example please?

Associative arrays

http://www.w3schools.com/php/php_arrays.asp

??? IDK how I can use it here...

To convert "a:b" into [a, b] :

PHP:

$array = explode(":", $string);


The opposite:

PHP:

$string = implode(":", $array);