Shulou(Shulou.com)06/02 Report--

Editor to share with you what are the reasons for hiding hash values in thinkphp forms. I hope you will get something after reading this article. Let's discuss it together.

Some forms in ThinkPHP will add a hidden hash value, which is said in the manual to prevent repeated submission of the form and other security protection, what does the security protection refer to here?

What is the reason why ThinkPHP forms hide hash values?

Then look at the answer ~

This is to prevent duplicate submissions, because sometimes we can only allow users to submit once

The specific principle is as follows:

First, the hash value is generated on the server side, and then saved to the session. When the user submits the hash, it first determines whether the hash exists in the session. If it exists, the hash value is cleared. The next time the hash value is submitted, the submission will fail because the hash value is no longer valid.

After reading this article, I believe you have a certain understanding of "what are the reasons for hiding hash values in thinkphp forms?" if you want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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