Online PHP editor | output for XXddr

<?php class A { const PRODUCT_STATUS_ACTIVE = 1; const PRODUCT_STATUS_INACTIVE = 0; const PRODUCT_STATUS_REJECT = 2; const PRODUCT_STATUS_DELETE = 3; const PRODUCT_STATUS_LABELS = [ self::PRODUCT_STATUS_INACTIVE => 'Inactive', self::PRODUCT_STATUS_ACTIVE => 'Active', self::PRODUCT_STATUS_REJECT => 'Rejected', self::PRODUCT_STATUS_DELETE => 'Deleted' ]; } $productStatus = 0; echo array_key_exists($productStatus, A::PRODUCT_STATUS_LABELS) ? 'true' : 'false';