PHP: Iterate all POST-Variables

I am transmitting a dynamic form using POST to one of my PHP scripts in order to evaluate the data there.

Usually, each POST variable can be retrieved using $_POST['name'] in the script. However, in my case, I need a solution with which I can go through or loop over all POST variables existing without knowing their name or key, because they are created dynamically and can be different each time executing the script.

So, I need something like a foreach for the $_POST variable, which can be otherwise used for an array. The requirement is that I would like to have all values and key names receiving via POST. Is this possible somehow?