Code

<?php

session_start();
$_SESSION["count"]++;
print_r($_SESSION);

$session_save_path = ini_get('session.save_path');

if(is_writable($session_save_path)){
    echo "<p>PHP session.save_path $session_save_path is writable</p>";
}
else {
    echo "<p>PHP session.save_path $session_save_path is NOT writable</p>";
}