Php recursive method

Question

I am trying to retrieve all my products of the current and child categories recursively, but unfortunatly it always returns an empty array. Here is my method.

class Category {

    public static $products = [];

    public static function products($id) {

        array_merge(self::$products, DB::table('products')->where('category_id', $id)->get());
        $categories = DB::table('categories')->where('parent_id', $id)->get();
        foreach ($categories as $category) {
            self::products($category->id);
        }
        return self::$products;
    }   

}

After executing this method Category::products is an empty array. Can someone help me find the correct way to do this?

you never add any products to the Categoriy::products array... — Richard87
– Richard87, Commented Jul 31, 2015 at 12:07

Barmar · Accepted Answer · 2015-07-31 12:09:11Z

1

You need to assign the result of array_merge. It returns a new array, it doesn't modify the argument array.

self::$products = array_merge(self::$products, DB::table('products')->where('category_id', $id)->get());

answered Jul 31, 2015 at 12:09

Barmar

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