how to reach to value

I have this object in my session

name: "test",
is_feature: "0",
attributes: [
  {
   '5': "blue"
  },
  {
   '7': "iOS"
  }
],
cost: "2000",

I want to use attributes in foreach.some thing like below code:

foreach ($product->attributes as $attribute){     
   ProductAttributeValue::create([
            'attribute_id' => $attribute->key,  //like 5,7
            'value' => $attribute->value  //like blue,iOS
        ]);
    }

via Chebli Mohamed