问题描述
我使用 smarty 和 mysql_real_escape_string() 进行用户输入，当我用 ' 或 " 插入一些代码，并在 phpmyadmin 中查找时它显示时没有反斜杠.
Im using smarty and mysql_real_escape_string() for user input,and when I insert some code with ' or " , and lookup in phpmyadminit shows without backslashes.
当我从数据库获取记录时，我也没有反斜杠.但是当我只是通过转义字符串而不插入数据库时它是反斜杠的.
When I get record from DB i doesn't have backslashes also.But when I just pass escaped string without inserting into the dbit is backslashed.
不应该添加斜线，插入斜线然后我会当我输出时剥离它们?还是我遗漏了什么?
Shouldn't it add slashes, insert with them and then I wouldstrip them when i would output?Or am I missing something?
推荐答案
你错过了它 - 使用反斜杠转义是为了确保查询没有格式错误，例如像这样的事情肯定会中断并可能冒 SQL 注入的风险:
You're missing it - escaping with backslashes is meant to ensure that queries aren't malformed, e.g. something like this will surely break and possibly risk SQL injections:
insert into table values ('whatever 'this' is')
表中不会保存任何内容，而这个:
and nothing will be saved in the table, whereas this:
insert into table values ('whatever \'this\' is')
将在表中保存值无论'这个'是什么".
will save the value "whatever 'this' is" in the table.
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