<?php
class Sotrage
{
      private static $db = array();
      public static function AddVar($varname, $varvalue)
      {
              if (!isset(self::$db[$varname])){
                    self::$db[$varname] = $varvalue;
                    return TRUE;
              }else{
                    return FALSE;
              }
      }
      public static function GetVar($varname)
      {
              return (isset(self::$db[$varname]))? self::$db[$varname]: FALSE;
      }
}
#USAGE
Sotrage::AddVar('DMA', 1);
echo Sotrage::GetVar('DMA');  //1
?>