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<?php final class CommandId { private $name; private $time; private $hash; public function __construct($name, $time = null, $hash = null) { $this->time = (float) $time ?: microtime(true); $this->name = trim($name); $this->hash = $hash ?: hash('crc32', rand(0, $this->time)); if (empty($this->name)) { throw new DomainException('Name must not be empty'); } } public static function fromString($idString) { $parts = explode('_', $idString); if (count($parts) != 3) { throw new DomainException("Unexpected format [$idString]"); } return new static($parts[0], $parts[1], $parts[2]); } public function name() { return $this->name; } public function time() { return $this->time; } public function equals(self $other) { return ($this->name == $other->name && $this->time == $other->time && $this->hash == $other->hash ); } public function __toString() { return implode('_', [$this->name, $this->time, $this->hash]); } } $one = new CommandId('foo'); var_dump((string) $one, $one->equals(CommandId::fromString((string) $one)));

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