对于这段代码:$title='0';$subTitle='1';$tableName='someString';$stmt=$dbh->prepare("SELECT`".$title."`,`".$subTitle."`FROM`".$tableName."_data`WHERE`id`=:key");$stmt->bindValue(':key','127');$stmt->execute();$result=$stmt->fetchAll();print_r($result);我得到$result是这样的:Array([0]=>Array([0]=>91651[1]=>91651