function __construct($id = -1) { if (self::$conn == Null) { self::$conn = mysqli_connect('localhost', 'root', 'iti', 'eShop'); } if ($id != -1) { $query = "select * from subcategories where scID={$id} limit 1"; $result = mysqli_query(self::$conn, $query); $subcategory = mysqli_fetch_assoc($result); $this->scID = $subcategory['scID']; $this->scName = $subcategory['scName']; $this->cID = $subcategory['cID']; } }