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验证码有关问题

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Release： 2016-06-13 13:33:33
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验证码问题
做了个验证码的类，但是验证时不怎么人性化，用SESSION保存随即数字
好像只能从后台PHP验证，获取$_SESSION的值与输入的值比较，
能不能放到前台验证啊，像用户名一样用JS，用户输入验证码后就知道错误还是正确

怎么做啊。。谢谢~


------解决方案--------------------
前台ajax提交后台验证啊。。。
------解决方案--------------------
一般采用后台验证，可以通过ajax来实时验证。
如果非要在前台js直接验证的话可以采取加密方式，但是风险依然存在，不推荐。

Related labels：
ajax php session
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