public static function SelectSpecific($obj, $data_base, $cond)
{
    self::$query = "select $obj from " . self::$baseprefix . "$data_base where $cond";
    $out = self::Execute();
    $array = mysql_fetch_array($out); // THIS LINE IS WARNING LINE
    return $array[$obj];
}

private static function Execute()
{
    $out = mysql_query(self::$query);
    return $out;
}

public static function SelectSpecific($obj, $data_base, $cond)
    {
        self::$query = "select $obj from " . self::$baseprefix . "$data_base where $cond";
        $out = self::Execute();
        if($out){
          $array = mysql_fetch_array($out); // THIS LINE IS WARNING LINE
          return $array[$obj];
       }else {
         return false;
       }
    }

if (!$out) {
    $message  = 'Invalid query: ' . mysql_error() . "n";
    $message .= 'Whole query: ' . $query;
    die($message);
}