PHP Redirect with POST data

Question

I did some research on this topic, and there are some experts who have said that it is not possible, so I would like to ask for an alternative solution.

My situation

Answer 1

Here there is another approach that works for me:

if you need to redirect to another web page (user.php) and includes a PHP variable ($user[0]):

header('Location:./user.php?u_id='.$user[0]);

or

header("Location:./user.php?u_id=$user[0]");