Ларавел проверяет, есть ли предмет в сборе
// You may also pass a key / value pair to the contains method,
// which will determine if the given pair exists in the collection:
$collection = collect([
['product' => 'Desk', 'price' => 200],
['product' => 'Chair', 'price' => 100],
]);
$collection->contains('product', 'Bookcase');
// false
Yingfufu