$twitterit = $post[title]." http://siteurl/showthread.php?t=".$thread[threadid]." #tag";
$twitterit = iconv('WINDOWS-1251', 'UTF-8', $twitterit); // Если у вас не UTF-8
$twitterit = urlencode(htmlspecialchars_decode($twitterit));

<a href="$twitterit" target="_blank" rel="nofollow"><img src="$stylevar[imgdir_button]/twitterit.gif" alt="Twitter It!" border="0" /></a>

// phpbb_hash($password) - Создание пароля
// phpbb_check_hash($password, $hash) - Верификация пароля
 
function unique_id()
{
    return substr(md5(rand().'_'.microtime().'_'.rand()), rand(0, 15), 16);
}
 
function _hash_gensalt_private($input, &$itoa64, $iteration_count_log2 = 6)
{
    if ($iteration_count_log2 < 4 || $iteration_count_log2 > 31)
    {
        $iteration_count_log2 = 8;
    }
    $output = '$H$';
    $output .= $itoa64[min($iteration_count_log2 + ((PHP_VERSION >= 5) ? 5 : 3), 30)];
    $output .= $_hash_encode64($input, 6, $itoa64); return $output;
}
 
function _hash_encode64($input, $count, &$itoa64)
{
    $output = '';
     $i = 0;
 
    do
    {
        $value = ord($input[$i++]);
         $output .= $itoa64[$value & 0x3f];
 
        if ($i < $count)
        {
            $value |= ord($input[$i]) << 8;
        }
 
        $output .= $itoa64[($value >> 6) & 0x3f];
 
        if ($i++ >= $count)
        {
            break;
        }
 
        if ($i < $count)
        {
            $value |= ord($input[$i]) << 16;
        }
 
        $output .= $itoa64[($value >> 12) & 0x3f];
 
        if ($i++ >= $count)
        {
            break;
        }
 
        $output .= $itoa64[($value >> 18) & 0x3f];
    }
     while ($i < $count);
 
    return $output;
}
 
function _hash_crypt_private($password, $setting, &$itoa64)
{
    $output = '*';
    // Check for correct hash
    if (substr($setting, 0, 3) != '$H$')
    {
        return $output;
    }
    $count_log2 = strpos($itoa64, $setting[3]);
    if ($count_log2 < 7 || $count_log2 > 30)
    {
        return $output;
    }
    $count = 1 << $count_log2;
    $salt = substr($setting, 4, 8);
    if (strlen($salt)
    != 8)
    {
        return $output;
    }
    if (PHP_VERSION >= 5)
    {
        $hash = md5($salt . $password, true);
        do
        {
            $hash = md5($hash . $password, true);
        }
         while (--$count);
    }
    else
    {
        $hash = pack('H*', md5($salt . $password));
        do
        {
            $hash = pack('H*', md5($hash . $password));
        }
         while (--$count);
    }
    $output = substr($setting, 0, 12);
    $output .= $_hash_encode64($hash, 16, $itoa64);
    return $output;
}
 
public function phpbb_hash($password)
{
    $itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
    $random_state = $unique_id();
    $random = '';
    $count = 6;
    if (($fh = @fopen('/dev/urandom', 'rb')))
    {
        $random = fread($fh, $count);
         fclose($fh);
    }
    if (strlen($random) < $count)
    {
        $random = '';
        for ($i = 0; $i < $count; $i += 16)
        {
            $random_state = md5($unique_id() . $random_state);
            $random .= pack('H*', md5($random_state));
        }
         $random = substr($random, 0, $count);
    }
    $hash = $_hash_crypt_private($password, $_hash_gensalt_private($random, $itoa64), $itoa64);
    if (strlen($hash) == 34)
    {
        return $hash;
    }
    return md5($password);
}
 
function phpbb_check_hash($password, $hash)
{
    $itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
    if (strlen($hash) == 34)
    {
        return ($_hash_crypt_private($password, $hash, $itoa64) === $hash) ? true : false;
    }
 
    return (md5($password) === $hash) ? true : false;
}

$browser = get_browser(null, true);
 
$ss = array(
            'sid'          => md5(date('U').rand(0,20)),
            'user_id'      => $forum['user_id'],
            'forum_id'     => '0',
            'last_visit'   => date('U'),
            'start_time'   => date('U'),
            'session_time' => date('U')+86400,
            'session_page' => 'index.php',
            'remote_ip'    => getenv('REMOTE_ADDR'),
            'browser'      => htmlspecialchars($browser['browser_name_pattern']),
            'autologin'    => '1'
            );