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问题描述



当回显 mysqli_real_escape_string($ db,mysqli_real_escape_string($ db,''));



其中一个将是输出:
1. \
2. \\\



是否一个安全的方法来检查一个字符串是否已被转义?



不幸的是,目前我无法测试,因为我无法访问MySQL 24小时。

解决方案

输出是 \\\(你的第二个例子) p>

我不认为你可以确定一个字符串是否已经被转义,你应该按照你只能调用 mysqli_real_escape_string()一次。


I'm using mysqli.

When I echo mysqli_real_escape_string($db,mysqli_real_escape_string($db,'"'));

which one of those will be the output:1. \"2. \\\"?

Is there a safe way to check whether a string has been already escaped?

Unfortunately, I cannot test at present as I cannot access MySQL for 24 hours.

解决方案

The output is \\\" (your second example).

I don't think you can reliably say whether a string has already been escaped or not, you should organize your code in a way that you only can call mysqli_real_escape_string() once.

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09-22 14:05