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PHP防注入求教?

本帖最后由 u010572351 于 2013-06-27 21:10:49 编辑 目前我知道的sql攻击是填入了大量的 '%这样的特殊字符来实现的,如果我是登陆界面想要防sql攻击,

我知道用户名和密码不会出现特殊字符,我使用正则匹配,只要出现了特殊字符我直接就将其打死,这样处理好吗?

还有,addslashes 一般做什么用的啊?麻烦高手多分享下防注入这些,小白知道的太少了。

主要是以下不是很清楚:
magic_quotes_gpc=off
magic_quotes_gpc=on
addslashes()
stripslashes()
str_replace();

如果不是登陆、搜索等入口页面,平时php页面正常的dql语句应该不用考虑注入问题吧。
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