CODE EXAMPLE FOR PHP

laravel validation exists array

$request = [
    'ids' => [1, 2, 3, 4],
];

$rules = [
    'ids' => 'required|array',
    'ids.*' => 'exists:users,id', // check each item in the array
];

$validator = Validator::make($request, $rules);

dd($validator->passes(), $validator->messages()->toArray());