<?php

function open() {

    echo 'session start';

    echo "\n";

}

function close() {

    echo 'session close';

    echo "\n";

}

function read($sessionId) {

    echo 'read'.$sessionId;

    echo "\n";

}

function write($sessionId, $data) {

    echo 'write'.$sessionId.$data;

    echo "\n";

}

function destroy($sessionId) {

    echo 'destroy '.$sessionId;

    echo "\n";

}

function gc($lifetime) {

    echo 'gcccc';

    echo "\n";

}

session_set_save_handler('open', 'close', 'read', 'write', 'destroy', 'gc');

session_start();

echo session_id();

echo "\n";

session_destroy();

session_start();

$id = 'h06vgdfdfve6b8f66sva6basf8';

session_id($id);

echo session_id();

 Fatal error: session_start() [<a href='function.session-start'>function.session-start</a>]: Failed to initialize storage module: user (path: /var/lib/php/session) in /home/user/site/session.php on line 39