define, that the user came from specific page? (in PHP) -

What is the way to define in PHP, that the user came from a specific page? Without "post" requests
I have an "add post" page when the user submits a post, on the next page, he can submit some more information. But when the user clicks on the "back" in the browser, he frees up the "add a post" form, and what I want is that the user can modify the information previously submitted, but only if he returns from this second page Presses

$ _ SERVER ['HTTP_REFERER'] - does not seem to work. Maybe I can set some data in the second at $ _ session and leave it already on every second page .. but it does not look very smart like this.

  PHP $ _SESSION to store temporary data (especially if you can not use $ _POST) There is a great, easy improvement for you. You only need to clear the session value once, not on every page.  
 I'm asking that I'm not 100% clear, but try to see some other values in $ _SERVER; Maybe you want what you want








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