PHP : How to call method from other class without inheritance - php

Question

I have a little problem here, sorry if asking a dumb question.
so, I have StoreCategories Class which have :
class StoreCategories
{
private $store_category_id;
private $category;
public function setStoreCategoryId($store_category_id)
{
$this->store_category_id = $store_category_id;
}
public function getStoreCategoryId()
{
return $this->store_category_id;
}
public function setCategory($category)
{
$this->category = $category;
}
public function getCategory()
{
return $this->category;
}
}
In my index.php I declare the object like this :
$types = array();
while($stmt->fetch())
{
$type = new StoreCategories();
$type->setCardId($card_id);
$type->setStoreCategoryId($store_category_id);
$type->setCategory($category);
array_push($types, $type);
}
As you see, I want to set Card ID which is not in the StoreCategories Class..
I have a Card Class like this :
class Card
{
private $card_id;
public function setCardId($card_id)
{
$this->card_id = $card_id;
}
public function getCardId()
{
return $this->card_id;
}
}
I know I can user Class Card extends StoreCategories to get the Card ID, but it's too much risk..
Anyone have the other ways to do it ?
Thanks :)

Answer 1

You can use Traits
Move common part of the code into new trait:
trait CardIdTrait {
private $card_id;
public function setCardId($card_id)
{
$this->card_id = $card_id;
}
public function getCardId()
{
return $this->card_id;
}
}
And modify Card class to:
class Card {
use CardIdTrait;
}
and
class StoreCategories
{
use CardIdTrait;
private $store_category_id;
private $category;
// ...
}