Online PHP editor | output for gfBAC

<?php abstract class Constraint { public function __construct(array $options = null) { $defaultOptions = $this->getDefaultOptions(); foreach ($this as $option => $value) { if (isset($defaultOptions[$option])) { $this->{$option} = $defaultOptions[$option]; } else { throw new Exception('Ошибочка'); } } if (null !== $options) { $vars = get_object_vars($this); foreach ($options as $option => $value) { if (isset($vars[$option])) { $this->{$option} = $value; } else { throw new Exception('Ошибочка 2'); } } } } abstract protected function getDefaultOptions(): array; } class Length extends Constraint { public $min = 1; public $max; public $minMessage; public $maxMessage; public function __construct(array $options = null) { parent::__construct($options); } protected function getDefaultOptions(): array { return [ 'min' => 2, 'max' => 50, 'minMessage' => 'Значение меньше 2 символов', 'maxMessage' => 'Значение больше 50 символов' ]; } } interface ValidatorInterface { public function validate($value, Constraint $constraint): ?string; } class LengthValidator implements ValidatorInterface { public function validate($value, Constraint $constraint): ?string { if (!$constraint instanceof Length) { throw new Exception(); } $length = mb_strlen(trim($value)); if ($length < $constraint->min) { return $constraint->minMessage; } elseif ($length > $constraint->max) { return $constraint->maxMessage; } return null; } } $length = new Length([ 'min' => 3, 'max' => 50 ]); $lengthValidator = new LengthValidator(); $result = $lengthValidator->validate('Ян', $length); var_dump($result);