public static function num_rows($queryDB, $objectStr = '') { switch (self::$dbType) { case "mysqli": $totalRows = $queryDB->num_rows; if (is_object($objectStr)) { $objectStr($totalRows); } return $totalRows; break; case "sqlserver": $totalRows = DatabaseSqlserver::num_rows($queryDB, $objectStr); return $totalRows; break; case "mssql": $totalRows = DatabaseMSSQL::num_rows($queryDB, $objectStr); return $totalRows; break; case "pdo": $totalRows = DatabasePDO::num_rows($queryDB, $objectStr); return $totalRows; break; } }