How to get object values inside array in laravel?

I received this data form{} from view in my controller ($rquest) How to get "product_id" values in product array with x items {} to use them in my controller ?

form: {
   id: null,
   sale_number: 2,
   client: null,
   products: [
      { product_id:1,description: null, quantity:1, price: 1}
      { product_id:2,description: null, quantity:1, price: 1}
      { product_id:3,description: null, quantity:1, price: 1}
      .....etc
   ],
}

via Chebli Mohamed