<?php class ValueObject implements JsonSerializable { private $value; public function get() { return $value; } public function jsonSerialize() { return $this->value; } } class Email extends ValueObject { public function __construct(string $value) { $email = filter_var($value, FILTER_VALIDATE_EMAIL); if (false === $email) { throw new Exception('Email is invalid.'); } $this->value = $email; } } class Age extends ValueObject { public function __construct(int $value) { if ($value > 150) { throw new Exception('Age must be less than 150.'); } $this->value = $value; } } $email = new Email('opexus@gmail.com'); $age = new Age(23); echo json_encode(compact('email', 'age'));
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