如果从外部源获取，除字符串之外的其他数据类型是否可能有害？

It's a well known truth, that you don't can trust user inputs. These inputs can be even an security-problem, if they are used unfiltered. XSS and SQL-injections are possible problems coming from using unfiltered user-input (or input, that can be changed by the user).It's a well known truth, that you don't can tru