Paging::__construct PHP Méthode

        public function __construct($startIndex = null, $numberResults = null)
        {
            $this->startIndex = $startIndex;
            $this->numberResults = $numberResults;
        }

 /**
  * SQL Paging
  *
  * @param string $sql SQL Query without LIMIT x,x
  * @param integer $page Current page
  * @param integer $pagesize Page size
  */
 function __construct($sql = null, $page = null, $pagesize = null)
 {
     parent::__construct($page, 0, $pagesize);
     $this->DB = Core::GetDBInstance();
     if ($sql) {
         $this->SetSQLQuery($sql);
     }
 }