Add category when I create a product on PrestaShop

I am creating an import module products on PrestaShop 1.6. the product is created without problems but the categories are not included.

I used:

$product->id_category = array();
foreach($arr_cat_full as $cat){
$category = Category::searchByName(1, trim($cat), true);
$product->id_category[] = (int)$category['id_category'];
}

If I enter:

var_dump($category['id_category']);

The result is correct.

You must use `addToCategories($categories = array())` function of `Product` class.

to use in this way:

$array_cc = array();
$product->id_category = array();
foreach($arr_cat_full as $cat){
$category = Category::searchByName(1, trim($cat), true);
$array_cc = (int)$category['id_category'];
}

$product->add();
$product->addToCategories($array_cc);

Good luck.