Yesterday, I spent a good four hours trying to track down a super frustrating problem. I had a page that needed some additional security features added to it. Basically, I wanted to make sure that once the given page was loaded, only one link on said page could be used. To do this, I stored a random value in the user's session. Then, I would pass that value through each link and compare it to the stored session value. On each target link, I would then clear the random session value, rendering ...
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