- if (empty(self::$_single)) {
- include "lib/schema.{$type}.php";
- $class = $type.='Schema';
- self::$_single = new $class();
+ if (empty(self::$_static[$key])) {
+ $schemaClass = ucfirst($type).'Schema';
+ self::$_static[$key] = new $schemaClass($conn);