Online PHP editor | refs for GBANX

<?php class SiteId { protected $id; public function __construct($id) { $this->id = $id; } public function getId() { return $this->id; } } $id = "1"; var_dump($id); $siteId = new SiteId($id); echo "Is Site ID a string? "; var_dump(is_string($siteId)); echo "\n"; $identifiers = []; $identifiers[$siteId->getId()][] = 'test'; var_dump(array_keys($identifiers));