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Bugs & Features
<?php class ValueObject implements JsonSerializable { protected $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'));
based on 5QPIu

Shows result from various feature-branches currently under review from the php developers. Contact me to have additional branches featured.

Output for Array change keys
Output for Lexical anon
Catchable fatal error: Argument 1 passed to Email::__construct() must be an instance of string, string given, called in /in/RmIoQ on line 27 and defined in /in/RmIoQ on line 9
Output for Typed properties

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page