验证码是图片,后台如何验证用户输入的一致呢-PHP Tutorial-php.cn

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验证码是图片,后台如何验证用户输入的一致呢

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Jun 13, 2016 am 10:15 AM

phpsession

验证码是图片,后台怎么验证用户输入的一致呢?
用户输入了验证图上的验证码,但程序怎么知道是跟图片一样的字?

------解决方案--------------------
图片由php生成
------解决方案--------------------
保留用于生成图片的字符串
然后将用户的输入和这个字符串比较
------解决方案--------------------
验证码里面的背景,干扰点，干扰线是生成的图片,里面的字符串是你自己用程序生成的,建议你用SESSION保存.

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