code: public static function set(string $sName, $mValue, int $iFlag = 0, int $iExpire = 0)
  	{
  		return self::_getCacheObject()->set($sName, $mValue, $iFlag, $iExpire);
  	}
docs: set a value
  
  @access public
  @param  string $sName name of the session
  @param  mixed $mValue value of this sesion var
  @param  int $iFlag unused
  @param  int $iExpire expiration of cache
  @return void