public function __construct($credsVar)
 {
     $this->credsVar = $credsVar;
     $this->logQueries = defined('LOGQUERIES') && LOGQUERIES;
     $this->uniqueID = 'sqldb-' . session_id();
     if (!file_exists(MYSQLVARPATH)) {
         mkdir(MYSQLVARPATH);
     }
     MySQLDatabase::GC();
 }