Check if session is working well

session.php

<?php
    $session_path = ini_get('session.save_path');

    if( file_exists($session_path) ) {
        echo 'Session path exists: ' . $session_path;
    } else {
        echo 'Session path doesn\'t exist: ';
        echo $session_path;
        exit();
    }

    echo '<br/>';

    if( is_writable($session_path) ) {
        echo 'Session path is writable';
    } else {
        echo 'Session path is not writable';
    }
?>