Online PHP editor | output for DJhth

<?php declare(strict_types=1); final readonly class Version { private string $version; private function __construct( string $version ){ // TODO: ensure is valid $this->version = $version; } public static function fromString(string $string): self { return new self($string); } } final readonly class Example { private ?Version $modifiedVersionForCloning = null; public function __construct( public Version $version ) {} public function __clone() { $this->version = $this->modifiedVersionForCloning; $this->modifiedVersionForCloning = null; } public function lol(string $version): self { $this->modifiedVersionForCloning = Version::fromString($version); $clone = clone $this; return $clone; } } $example = new Example(Version::fromString('8.2')); var_dump($example->lol('8.3'));