dongsong1911 2012-02-08 23:05
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停止欺骗表单提交

I have a question about stopping spoofed form submissions. How about if by using the $_SERVER['HTTP_REFERER'] I only allow submissions to my forms coming from my website? Would that help?! Thanks!

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  • dqs86517 2012-02-08 23:08
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    It would help, and it's fairly easy thing to add but it wont stop a targeted attack, after all you can spoof a HTTP_REFERER header.

    One thing to keep in mind is that a client is not required to send a HTTP_REFERER, so if the header is missing you might want to allow submissions anyway. If this is not possible, then checking HTTP_REFERER wont help you.

    Run a search for CAPTCHA "Completely Automated Public Turing test to tell Computers and Humans Apart", this is what you're really looking for.

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