<?php

$thisfile = basename(__FILE__);
session_start();

if (isset($_POST['test'])) {
	$_SESSION['test']="set";
	header('Location:'.$thisfile.'');
}

echo "<form method='post' action=''>
	<input type='submit' name='teszt' value='set post'>";

//I want to display (var dump) the session variable after the redirect, then destroy it. but it is not working

if (isset($_SESSION['test'])) {
	var_dump($_SESSION);
 unset($_SESSION['test']);
}