I know the title is not describing the problem very well, so I explain here: I have multiple $_POST with similar names, like question1,question2,question3...
I have a for loop with $i. i want to get this vars ($question1, $question2), in help with $i. For example:
$question.$i = $_POST['question' . $i];
I want to do it because the number of questions is variable, so I have a button that add questions and answers to the page and then you submit it.