App\Modules\Users\Controllers\Admin\Users::validate PHP Method

    protected function validate(array $data, $id = null)
    {
        if (!is_null($id)) {
            $ignore = ',' . intval($id);
            $required = 'sometimes|required';
        } else {
            $ignore = '';
            $required = 'required';
        }
        // The Validation rules.
        $rules = array('username' => 'required|min:4|max:100|alpha_dash|unique:users,username' . $ignore, 'role' => 'required|numeric|exists:roles,id', 'realname' => 'required|min:5|max:100|valid_name', 'password' => $required . '|confirmed|strong_password', 'password_confirmation' => $required . '|same:password', 'email' => 'required|min:5|max:100|email');
        $messages = array('valid_name' => __d('users', 'The :attribute field is not a valid name.'), 'strong_password' => __d('users', 'The :attribute field is not strong enough.'));
        $attributes = array('username' => __d('users', 'Username'), 'role' => __d('users', 'Role'), 'realname' => __d('users', 'Name and Surname'), 'password' => __d('users', 'Password'), 'password_confirmation' => __d('users', 'Password confirmation'), 'email' => __d('users', 'E-mail'));
        // Add the custom Validation Rule commands.
        Validator::extend('valid_name', function ($attribute, $value, $parameters) {
            $pattern = '~^(?:[\\p{L}\\p{Mn}\\p{Pd}\'\\x{2019}]+(?:$|\\s+)){2,}$~u';
            return preg_match($pattern, $value) === 1;
        });
        Validator::extend('strong_password', function ($attribute, $value, $parameters) {
            $pattern = "/(?=^.{8,}\$)((?=.*\\d)|(?=.*\\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*\$/";
            return preg_match($pattern, $value) === 1;
        });
        return Validator::make($data, $rules, $messages, $attributes);
    }