update corrected

Author: chak10

beta/class_backup_SQL.php

@@ -17,7 +17,7 @@ class DB {
  **/
 
  public function con($HOST, $USER, $PASSWD, $NAME, $PORT = null, $SOCK = null) {
- if (!class_exists("mysqli")) {
+ if (class_exists("mysqli")) {
  $this->type = "mysqli";
  return $this->con_mysqli($HOST, $USER, $PASSWD, $NAME, $PORT, $SOCK);
  } elseif (class_exists("PDO") && in_array('mysql', PDO::getAvailableDrivers())) {
@@ -893,6 +893,7 @@ private function clean_var() {
  unset($this->name_file);
  unset($this->path_file);
  unset($this->exec_time);
+unset($this->last_err_db);
  }
 
  private function debug() {