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bUcKl3

Form Hashing

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I noticed that in some forms..like those in some forums. they have some <input type="hidden" stuff in the source code.

I wonder what does that really do.

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An input hidden field sends a value through the form but can't actually be seen in the browser. For example a common one used is the maximum file size handled by a file upload form. They are sometimes used for external forms that you can't control, like Paypal. You need to send your details through a form but not so you actually have to enter them in a form every time.

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