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<?php class Email implements JsonSerializable { private $value; public function __construct(string $value) { $email = filter_var($value, FILTER_VALIDATE_EMAIL); if (false === $email) { throw new Exception('Email is invalid.'); } $this->value = $email; } public function jsonSerialize() { return $this->value; } } class Age implements JsonSerializable { private $value; public function __construct(int $value) { if ($value > 150) { throw new Exception('Age must be less than 150.'); } $this->value = $value; } public function jsonSerialize() { return $this->value; } } $email = new Email('opexus@gmail.com'); $age = new Age(23); echo json_encode(compact('email', 'age'));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Email::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4GMe4 on line 14 Deprecated: Return type of Age::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4GMe4 on line 29 {"email":"opexus@gmail.com","age":23}

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