Example #1
0
 /**
  * Validates the input value according to this attribute.
  *
  * @param InputInterface $input The input to validate
  *
  * @throws InvalidValueException If the value is not valid
  */
 public static function validate(InputInterface $input)
 {
     if (!($value = $input->val())) {
         return;
     }
     if ($input->attr('multiple')) {
         if (array_keys(array_diff_key(array_flip($value), $input->options()))) {
             throw new InvalidValueException(sprintf(static::$error_message));
         }
     } elseif (!isset($input[$value])) {
         throw new InvalidValueException(sprintf(static::$error_message));
     }
 }