static function connect()
{
if (is_null(self::$connection)) {
$sqlData = Config::getSQL();
$conn = new mysqli($sqlData["server"], $sqlData["name"], $sqlData["pass"], $sqlData["db"]);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
self::$connection = $conn;
}
return self::$connection;
}
