Laravel IN Validation or Validation by ENUM Values

The accepted answer is OK, but I want to add how to set the in rule to use existing constants or array of values.

So, if you have:

class MyClass {
  const DEFAULT = 'default';
  const SOCIAL = 'social';
  const WHATEVER = 'whatever';
  ...

You can make a validation rule by using Illuminate\Validation\Rule's in method:

'type' => Rule::in([MyClass::DEFAULT, MyClass::SOCIAL, MyClass::WHATEVER])

Or, if You have those values already grouped in an array, you can do:

class MyClass {
  const DEFAULT = 'default';
  const SOCIAL = 'social';
  const WHATEVER = 'whatever';
  public static $types = [self::DEFAULT, self::SOCIAL, self::WHATEVER];

and then write the rule as:

'type' => Rule::in(MyClass::$types)

in:DEFAULT,SOCIAL
The field under validation must be included in the given list of values.

not_in:DEFAULT,SOCIAL
The field under validation must not be included in the given list of values.

$validator = Validator::make(Input::only(['username', 'password', 'type']), [
    'type' => 'in:DEFAULT,SOCIAL', // DEFAULT or SOCIAL values
    'username' => 'required|min:6|max:255',
    'password' => 'required|min:6|max:255'
]);