troubleshooting Question

Only Allow My Server to Post Data From a PHP Form

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Jason92sFlag for Afghanistan asked on
PHPWeb Development
6 Comments1 Solution273 ViewsLast Modified:
Been searching online for an answer and can't find anything.  Let's say I have a simple PHP form.  It uses session variables so it knows the user's username.  Is there a way to prevent a user from logging in, then opening another tab in their browser and using a copy of that form located on their server and submitting the values to my form that processes the values?  I know I can check the header, but that can be faked.  Same thing with the IP address.  I just want to be able to know with certainty that when a form is submitted, it came from a user using my form on my server.  My actual need is a little more complicated than this, but the general premise is the same, so I tried to make it as simple as possible.  Thanks.
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