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<?php



//

// Cookie stuff!

//

function check_cookie(&$pun_user)

{

    global $db, $pun_config, $cookie_name, $cookie_seed;



    $now = time();

    $expire = $now + 31536000;    // The cookie expires after a year



    // We assume it's a guest

    $cookie = array('user_id' => 1, 'password_hash' => 'Guest');



    // If a cookie is set, we get the user_id and password hash from it

    if (isset($_COOKIE[$cookie_name]))

        list($cookie['user_id'], $cookie['password_hash']) = @unserialize($_COOKIE[$cookie_name]);



    if ($cookie['user_id'] > 1)

    {

        // Check if there's a user with the user ID and password hash from the cookie

        $result = $db->query('SELECT u.*, g.*, o.logged, o.idle FROM '.$db->prefix.'users AS u INNER JOIN '.$db->prefix.'groups AS g ON u.group_id=g.g_id LEFT JOIN '.$db->prefix.'online AS o ON o.user_id=u.id WHERE u.id='.intval($cookie['user_id'])) or error('Unable to fetch user information', __FILE__, __LINE__, $db->error());

        $pun_user = $db->fetch_assoc($result);



        // If user authorisation failed

        if (!isset($pun_user['id']) || md5($cookie_seed.$pun_user['password']) !== $cookie['password_hash'])

        {

            pun_setcookie(0, random_pass(8), $expire);

            set_default_user();



            return;

        }



        // Set a default language if the user selected language no longer exists

        if (!@file_exists(PUN_ROOT.'lang/'.$pun_user['language']))

            $pun_user['language'] = $pun_config['o_default_lang'];



        // Set a default style if the user selected style no longer exists

        if (!@file_exists(PUN_ROOT.'style/'.$pun_user['style'].'.css'))

            $pun_user['style'] = $pun_config['o_default_style'];



        if (!$pun_user['disp_topics'])

            $pun_user['disp_topics'] = $pun_config['o_disp_topics_default'];

        if (!$pun_user['disp_posts'])

            $pun_user['disp_posts'] = $pun_config['o_disp_posts_default'];



        if ($pun_user['save_pass'] == '0')

            $expire = 0;



        // Define this if you want this visit to affect the online list and the users last visit data

        if (!defined('PUN_QUIET_VISIT'))

        {

            // Update the online list

            if (!$pun_user['logged'])

                $db->query('INSERT INTO '.$db->prefix.'online (user_id, ident, logged) VALUES('.$pun_user['id'].', \''.$db->escape($pun_user['username']).'\', '.$now.')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());

            else

            {

                // Special case: We've timed out, but no other user has browsed the forums since we timed out

                if ($pun_user['logged'] < ($now-$pun_config['o_timeout_visit']))

                {

                    $db->query('UPDATE '.$db->prefix.'users SET last_visit='.$pun_user['logged'].' WHERE id='.$pun_user['id']) or error('Unable to update user visit data', __FILE__, __LINE__, $db->error());

                    $pun_user['last_visit'] = $pun_user['logged'];

                }



                $idle_sql = ($pun_user['idle'] == '1') ? ', idle=0' : '';

                $db->query('UPDATE '.$db->prefix.'online SET logged='.$now.$idle_sql.' WHERE user_id='.$pun_user['id']) or error('Unable to update online list', __FILE__, __LINE__, $db->error());

            }

        }



        $pun_user['is_guest'] = false;

    }

    else

        set_default_user();

}





//

// Fill $pun_user with default values (for guests)

//

function set_default_user()

{

    global $db, $pun_user, $pun_config;



    $remote_addr = get_remote_address();



    // Fetch guest user

    $result = $db->query('SELECT u.*, g.*, o.logged, o.last_post AS o_last_post FROM '.$db->prefix.'users AS u INNER JOIN '.$db->prefix.'groups AS g ON u.group_id=g.g_id LEFT JOIN '.$db->prefix.'online AS o ON o.ident=\''.$remote_addr.'\' WHERE u.id=1') or error('Unable to fetch guest information', __FILE__, __LINE__, $db->error());




    if (!$db->num_rows($result))

        exit('Unable to fetch guest information. The table \''.$db->prefix.'users\' must contain an entry with id = 1 that represents anonymous users.');



    $pun_user = $db->fetch_assoc($result);



    // Update online list

    if (!$pun_user['logged'])

        $db->query('INSERT INTO '.$db->prefix.'online (user_id, ident, logged) VALUES(1, \''.$db->escape($remote_addr).'\', '.time().')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());

    else

        $db->query('UPDATE '.$db->prefix.'online SET logged='.time().' WHERE ident=\''.$db->escape($remote_addr).'\'') or error('Unable to update online list', __FILE__, __LINE__, $db->error());



    $pun_user['disp_topics'] = $pun_config['o_disp_topics_default'];

    $pun_user['disp_posts'] = $pun_config['o_disp_posts_default'];

    $pun_user['timezone'] = $pun_config['o_server_timezone'];

    $pun_user['language'] = $pun_config['o_default_lang'];

    $pun_user['style'] = $pun_config['o_default_style'];

    $pun_user['is_guest'] = true;

}





//

// Set a cookie, PunBB style!

//

function pun_setcookie($user_id, $password_hash, $expire)

{

    global $cookie_name, $cookie_path, $cookie_domain, $cookie_secure, $cookie_seed;



    // Enable sending of a P3P header by removing // from the following line (try this if login is failing in IE6)

//    @header('P3P: CP="CUR ADM"');



    if (version_compare(PHP_VERSION, '5.2.0', '>='))

        setcookie($cookie_name, serialize(array($user_id, md5($cookie_seed.$password_hash))), $expire, $cookie_path, $cookie_domain, $cookie_secure, true);

    else

        setcookie($cookie_name, serialize(array($user_id, md5($cookie_seed.$password_hash))), $expire, $cookie_path.'; HttpOnly', $cookie_domain, $cookie_secure);

}





//

// Check whether the connecting user is banned (and delete any expired bans while we're at it)

//

function check_bans()

{

    global $db, $pun_config, $lang_common, $pun_user, $pun_bans;



    // Admins aren't affected

    if ($pun_user['g_id'] == PUN_ADMIN || !$pun_bans)

        return;



    // Add a dot at the end of the IP address to prevent banned address 192.168.0.5 from matching e.g. 192.168.0.50

    $user_ip = get_remote_address().'.';

    $bans_altered = false;



    foreach ($pun_bans as $cur_ban)

    {

        // Has this ban expired?

        if ($cur_ban['expire'] != '' && $cur_ban['expire'] <= time())

        {

            $db->query('DELETE FROM '.$db->prefix.'bans WHERE id='.$cur_ban['id']) or error('Unable to delete expired ban', __FILE__, __LINE__, $db->error());

            $bans_altered = true;

            continue;

        }



        if ($cur_ban['username'] != '' && !strcasecmp($pun_user['username'], $cur_ban['username']))

        {

            $db->query('DELETE FROM '.$db->prefix.'online WHERE ident=\''.$db->escape($pun_user['username']).'\'') or error('Unable to delete from online list', __FILE__, __LINE__, $db->error());

            message($lang_common['Ban message'].' '.(($cur_ban['expire'] != '') ? $lang_common['Ban message 2'].' '.strtolower(format_time($cur_ban['expire'], true)).'. ' : '').(($cur_ban['message'] != '') ? $lang_common['Ban message 3'].'<br /><br /><strong>'.pun_htmlspecialchars($cur_ban['message']).'</strong><br /><br />' : '<br /><br />').$lang_common['Ban message 4'].' <a href="mailto:'.$pun_config['o_admin_email'].'">'.$pun_config['o_admin_email'].'</a>.', true);

        }



        if ($cur_ban['ip'] != '')

        {

            $cur_ban_ips = explode(' ', $cur_ban['ip']);



            for ($i = 0; $i < count($cur_ban_ips); ++$i)

            {

                $cur_ban_ips[$i] = $cur_ban_ips[$i].'.';



                if (substr($user_ip, 0, strlen($cur_ban_ips[$i])) == $cur_ban_ips[$i])

                {

                    $db->query('DELETE FROM '.$db->prefix.'online WHERE ident=\''.$db->escape($pun_user['username']).'\'') or error('Unable to delete from online list', __FILE__, __LINE__, $db->error());

                    message($lang_common['Ban message'].' '.(($cur_ban['expire'] != '') ? $lang_common['Ban message 2'].' '.strtolower(format_time($cur_ban['expire'], true)).'. ' : '').(($cur_ban['message'] != '') ? $lang_common['Ban message 3'].'<br /><br /><strong>'.pun_htmlspecialchars($cur_ban['message']).'</strong><br /><br />' : '<br /><br />').$lang_common['Ban message 4'].' <a href="mailto:'.$pun_config['o_admin_email'].'">'.$pun_config['o_admin_email'].'</a>.', true);

                }

            }

        }

    }



    // If we removed any expired bans during our run-through, we need to regenerate the bans cache

    if ($bans_altered)

    {

        require_once PUN_ROOT.'include/cache.php';

        generate_bans_cache();

    }

}





//

// Update "Users online"

//

function update_users_online()

{

    global $db, $pun_config, $pun_user;



    $now = time();



    // Fetch all online list entries that are older than "o_timeout_online"

    $result = $db->query('SELECT * FROM '.$db->prefix.'online WHERE logged<'.($now-$pun_config['o_timeout_online'])) or error('Unable to fetch old entries from online list', __FILE__, __LINE__, $db->error());

    while ($cur_user = $db->fetch_assoc($result))

    {

        // If the entry is a guest, delete it

        if ($cur_user['user_id'] == '1')

            $db->query('DELETE FROM '.$db->prefix.'online WHERE ident=\''.$db->escape($cur_user['ident']).'\'') or error('Unable to delete from online list', __FILE__, __LINE__, $db->error());

        else

        {

            // If the entry is older than "o_timeout_visit", update last_visit for the user in question, then delete him/her from the online list

            if ($cur_user['logged'] < ($now-$pun_config['o_timeout_visit']))

            {

                $db->query('UPDATE '.$db->prefix.'users SET last_visit='.$cur_user['logged'].' WHERE id='.$cur_user['user_id']) or error('Unable to update user visit data', __FILE__, __LINE__, $db->error());

                $db->query('DELETE FROM '.$db->prefix.'online WHERE user_id='.$cur_user['user_id']) or error('Unable to delete from online list', __FILE__, __LINE__, $db->error());

            }

            else if ($cur_user['idle'] == '0')

                $db->query('UPDATE '.$db->prefix.'online SET idle=1 WHERE user_id='.$cur_user['user_id']) or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());

        }

    }

}





//

// Generate the "navigator" that appears at the top of every page

//

function generate_navlinks()

{

    global $pun_config, $lang_common, $pun_user;



    // Index and Userlist should always be displayed

    $links[] = '<li id="navindex"><a href="index.php">'.$lang_common['Index'].'</a>';



    if ($pun_config['o_rules'] == '1')

        $links[] = '<li id="navrules"><a href="misc.php?action=rules">'.$lang_common['Rules'].'</a>';



    if ($pun_user['is_guest'])

    {

        if ($pun_user['g_search'] == '1')

            $links[] = '<li id="navsearch"><a href="search.php">'.$lang_common['Search'].'</a>';



        $links[] = '<li id="navregister"><a href="register.php">'.$lang_common['Register'].'</a>';

        $links[] = '<li id="navlogin"><a href="login.php">'.$lang_common['Login'].'</a>';



        $info = $lang_common['Not logged in'];

    }

    else

    {

        if ($pun_user['g_id'] > PUN_MOD)

        {

            if ($pun_user['g_search'] == '1')

                $links[] = '<li id="navsearch"><a href="search.php">'.$lang_common['Search'].'</a>';



            $links[] = '<li id="navprofile"><a href="profile.php?id='.$pun_user['id'].'">'.$lang_common['Profile'].'</a>';

            $links[] = '<li id="navlogout"><a href="login.php?action=out&id='.$pun_user['id'].'">'.$lang_common['Logout'].'</a>';

        }

        else

        {

            $links[] = '<li id="navsearch"><a href="search.php">'.$lang_common['Search'].'</a>';

            $links[] = '<li id="navprofile"><a href="profile.php?id='.$pun_user['id'].'">'.$lang_common['Profile'].'</a>';

            $links[] = '<li id="navadmin"><a href="admin_index.php">'.$lang_common['Admin'].'</a>';

            $links[] = '<li id="navlogout"><a href="login.php?action=out&id='.$pun_user['id'].'">'.$lang_common['Logout'].'</a>';

        }

    }



    // Are there any additional navlinks we should insert into the array before imploding it?

    if ($pun_config['o_additional_navlinks'] != '')

    {

        if (preg_match_all('#([0-9]+)\s*=\s*(.*?)\n#s', $pun_config['o_additional_navlinks']."\n", $extra_links))

        {

            // Insert any additional links into the $links array (at the correct index)

            for ($i = 0; $i < count($extra_links[1]); ++$i)

                array_splice($links, $extra_links[1][$i], 0, array('<li id="navextra'.($i + 1).'">'.$extra_links[2][$i]));

        }

    }



    return '<ul>'."\n\t\t\t\t".implode($lang_common['Link separator'].'</li>'."\n\t\t\t\t", $links).'</li>'."\n\t\t\t".'</ul>';

}





//

// Display the profile navigation menu

//

function generate_profile_menu($page = '')

{

    global $lang_profile, $pun_config, $pun_user, $id;



?>

<div id="profile" class="block2col">

    <div class="blockmenu">

        <h2><span><?php echo $lang_profile['Profile menu'] ?></span></h2>

        <div class="box">

            <div class="inbox">

                <ul>

                    <li<?php if ($page == 'essentials') echo ' class="isactive"'; ?>><a href="profile.php?section=essentials&id=<?php echo $id ?>"><?php echo $lang_profile['Section essentials'] ?></a></li>

                    <li<?php if ($page == 'personal') echo ' class="isactive"'; ?>><a href="profile.php?section=personal&id=<?php echo $id ?>"><?php echo $lang_profile['Section personal'] ?></a></li>

                    <li<?php if ($page == 'messaging') echo ' class="isactive"'; ?>><a href="profile.php?section=messaging&id=<?php echo $id ?>"><?php echo $lang_profile['Section messaging'] ?></a></li>

                    <li<?php if ($page == 'personality') echo ' class="isactive"'; ?>><a href="profile.php?section=personality&id=<?php echo $id ?>"><?php echo $lang_profile['Section personality'] ?></a></li>

                    <li<?php if ($page == 'display') echo ' class="isactive"'; ?>><a href="profile.php?section=display&id=<?php echo $id ?>"><?php echo $lang_profile['Section display'] ?></a></li>

                    <li<?php if ($page == 'privacy') echo ' class="isactive"'; ?>><a href="profile.php?section=privacy&id=<?php echo $id ?>"><?php echo $lang_profile['Section privacy'] ?></a></li>

<?php if ($pun_user['g_id'] == PUN_ADMIN || ($pun_user['g_id'] == PUN_MOD && $pun_config['p_mod_ban_users'] == '1')): ?>                    <li<?php if ($page == 'admin') echo ' class="isactive"'; ?>><a href="profile.php?section=admin&id=<?php echo $id ?>"><?php echo $lang_profile['Section admin'] ?></a></li>

<?php endif; ?>                </ul>

            </div>

        </div>

    </div>

<?php



}





//

// Update posts, topics, last_post, last_post_id and last_poster for a forum (redirect topics are not included)

//

function update_forum($forum_id)

{

    global $db;



    $result = $db->query('SELECT COUNT(id), SUM(num_replies) FROM '.$db->prefix.'topics WHERE moved_to IS NULL AND forum_id='.$forum_id) or error('Unable to fetch forum topic count', __FILE__, __LINE__, $db->error());

    list($num_topics, $num_posts) = $db->fetch_row($result);



    $num_posts = $num_posts + $num_topics;        // $num_posts is only the sum of all replies (we have to add the topic posts)



    $result = $db->query('SELECT last_post, last_post_id, last_poster FROM '.$db->prefix.'topics WHERE forum_id='.$forum_id.' AND moved_to IS NULL ORDER BY last_post DESC LIMIT 1') or error('Unable to fetch last_post/last_post_id/last_poster', __FILE__, __LINE__, $db->error());

    if ($db->num_rows($result))        // There are topics in the forum

    {

        list($last_post, $last_post_id, $last_poster) = $db->fetch_row($result);



        $db->query('UPDATE '.$db->prefix.'forums SET num_topics='.$num_topics.', num_posts='.$num_posts.', last_post='.$last_post.', last_post_id='.$last_post_id.', last_poster=\''.$db->escape($last_poster).'\' WHERE id='.$forum_id) or error('Unable to update last_post/last_post_id/last_poster', __FILE__, __LINE__, $db->error());

    }

    else    // There are no topics

        $db->query('UPDATE '.$db->prefix.'forums SET num_topics=0, num_posts=0, last_post=NULL, last_post_id=NULL, last_poster=NULL WHERE id='.$forum_id) or error('Unable to update last_post/last_post_id/last_poster', __FILE__, __LINE__, $db->error());

}





//

// Delete a topic and all of it's posts

//

function delete_topic($topic_id)

{

    global $db;



    // Delete the topic and any redirect topics

    $db->query('DELETE FROM '.$db->prefix.'topics WHERE id='.$topic_id.' OR moved_to='.$topic_id) or error('Unable to delete topic', __FILE__, __LINE__, $db->error());



    // Create a list of the post ID's in this topic

    $post_ids = '';

    $result = $db->query('SELECT id FROM '.$db->prefix.'posts WHERE topic_id='.$topic_id) or error('Unable to fetch posts', __FILE__, __LINE__, $db->error());

    while ($row = $db->fetch_row($result))

        $post_ids .= ($post_ids != '') ? ','.$row[0] : $row[0];



    // Make sure we have a list of post ID's

    if ($post_ids != '')

    {

        strip_search_index($post_ids);



        // Delete posts in topic

        $db->query('DELETE FROM '.$db->prefix.'posts WHERE topic_id='.$topic_id) or error('Unable to delete posts', __FILE__, __LINE__, $db->error());

    }



    // Delete any subscriptions for this topic

    $db->query('DELETE FROM '.$db->prefix.'subscriptions WHERE topic_id='.$topic_id) or error('Unable to delete subscriptions', __FILE__, __LINE__, $db->error());

}





//

// Delete a single post

//

function delete_post($post_id, $topic_id)

{

    global $db;



    $result = $db->query('SELECT id, poster, posted FROM '.$db->prefix.'posts WHERE topic_id='.$topic_id.' ORDER BY id DESC LIMIT 2') or error('Unable to fetch post info', __FILE__, __LINE__, $db->error());

    list($last_id, ,) = $db->fetch_row($result);

    list($second_last_id, $second_poster, $second_posted) = $db->fetch_row($result);



    // Delete the post

    $db->query('DELETE FROM '.$db->prefix.'posts WHERE id='.$post_id) or error('Unable to delete post', __FILE__, __LINE__, $db->error());



    strip_search_index($post_id);



    // Count number of replies in the topic

    $result = $db->query('SELECT COUNT(id) FROM '.$db->prefix.'posts WHERE topic_id='.$topic_id) or error('Unable to fetch post count for topic', __FILE__, __LINE__, $db->error());

    $num_replies = $db->result($result, 0) - 1;



    // If the message we deleted is the most recent in the topic (at the end of the topic)

    if ($last_id == $post_id)

    {

        // If there is a $second_last_id there is more than 1 reply to the topic

        if (!empty($second_last_id))

            $db->query('UPDATE '.$db->prefix.'topics SET last_post='.$second_posted.', last_post_id='.$second_last_id.', last_poster=\''.$db->escape($second_poster).'\', num_replies='.$num_replies.' WHERE id='.$topic_id) or error('Unable to update topic', __FILE__, __LINE__, $db->error());

        else

            // We deleted the only reply, so now last_post/last_post_id/last_poster is posted/id/poster from the topic itself

            $db->query('UPDATE '.$db->prefix.'topics SET last_post=posted, last_post_id=id, last_poster=poster, num_replies='.$num_replies.' WHERE id='.$topic_id) or error('Unable to update topic', __FILE__, __LINE__, $db->error());

    }

    else

        // Otherwise we just decrement the reply counter

        $db->query('UPDATE '.$db->prefix.'topics SET num_replies='.$num_replies.' WHERE id='.$topic_id) or error('Unable to update topic', __FILE__, __LINE__, $db->error());

}





//

// Replace censored words in $text

//

function censor_words($text)

{

    global $db;

    static $search_for, $replace_with;



    // If not already built in a previous call, build an array of censor words and their replacement text

    if (!isset($search_for))

    {

        $result = $db->query('SELECT search_for, replace_with FROM '.$db->prefix.'censoring') or error('Unable to fetch censor word list', __FILE__, __LINE__, $db->error());

        $num_words = $db->num_rows($result);



        $search_for = array();

        for ($i = 0; $i < $num_words; ++$i)

        {

            list($search_for[$i], $replace_with[$i]) = $db->fetch_row($result);

            $search_for[$i] = '/\b('.str_replace('\*', '\w*?', preg_quote($search_for[$i], '/')).')\b/i';

        }

    }



    if (!empty($search_for))

        $text = substr(preg_replace($search_for, $replace_with, ' '.$text.' '), 1, -1);



    return $text;

}





//

// Determines the correct title for $user

// $user must contain the elements 'username', 'title', 'posts', 'g_id' and 'g_user_title'

//

function get_title($user)

{

    global $db, $pun_config, $pun_bans, $lang_common;

    static $ban_list, $pun_ranks;



    // If not already built in a previous call, build an array of lowercase banned usernames

    if (empty($ban_list))

    {

        $ban_list = array();



        foreach ($pun_bans as $cur_ban)

            $ban_list[] = strtolower($cur_ban['username']);

    }



    // If not already loaded in a previous call, load the cached ranks

    if ($pun_config['o_ranks'] == '1' && empty($pun_ranks))

    {

        @include PUN_ROOT.'cache/cache_ranks.php';

        if (!defined('PUN_RANKS_LOADED'))

        {

            require_once PUN_ROOT.'include/cache.php';

            generate_ranks_cache();

            require PUN_ROOT.'cache/cache_ranks.php';

        }

    }



    // If the user has a custom title

    if ($user['title'] != '')

        $user_title = pun_htmlspecialchars($user['title']);

    // If the user is banned

    else if (in_array(strtolower($user['username']), $ban_list))

        $user_title = $lang_common['Banned'];

    // If the user group has a default user title

    else if ($user['g_user_title'] != '')

        $user_title = pun_htmlspecialchars($user['g_user_title']);

    // If the user is a guest

    else if ($user['g_id'] == PUN_GUEST)

        $user_title = $lang_common['Guest'];

    else

    {

        // Are there any ranks?

        if ($pun_config['o_ranks'] == '1' && !empty($pun_ranks))

        {

            @reset($pun_ranks);

            while (list(, $cur_rank) = @each($pun_ranks))

            {

                if (intval($user['num_posts']) >= $cur_rank['min_posts'])

                    $user_title = pun_htmlspecialchars($cur_rank['rank']);

            }

        }



        // If the user didn't "reach" any rank (or if ranks are disabled), we assign the default

        if (!isset($user_title))

            $user_title = $lang_common['Member'];

    }



    return $user_title;

}





//

// Generate a string with numbered links (for multipage scripts)

//

function paginate($num_pages, $cur_page, $link_to)

{

    $pages = array();

    $link_to_all = false;

$nav_links = true;



    // If $cur_page == -1, we link to all pages (used in viewforum.php)

    if ($cur_page == -1)

    {

        $cur_page = 1;

        $link_to_all = true;

$nav_links = false;

    }



    if ($num_pages <= 1)

        $pages = array('<strong>1</strong>');

    else

    {

        if ($cur_page > 3)

        {

            $pages[] = '<a href="'.$link_to.'&p=1">1</a>';



            if ($cur_page != 4)

                $pages[] = '…';

        }



        // Don't ask me how the following works. It just does, OK? :-)

        for ($current = $cur_page - 2, $stop = $cur_page + 3; $current < $stop; ++$current)

        {

            if ($current < 1 || $current > $num_pages)

                continue;

            else if ($current != $cur_page || $link_to_all)

                $pages[] = '<a href="'.$link_to.'&p='.$current.'">'.$current.'</a>';

            else

                $pages[] = '<strong>'.$current.'</strong>';

        }



        if ($cur_page <= ($num_pages-3))

        {

            if ($cur_page != ($num_pages-3))

                $pages[] = '…';



            $pages[] = '<a href="'.$link_to.'&p='.$num_pages.'">'.$num_pages.'</a>';

        }

    }

if($nav_links)

{

    if($cur_page > 1){

        $back_page_number = $cur_page-1;

        $back_page = '<a href="'.$link_to.'&p='.$back_page_number.'">«--</a>';

        array_splice($pages, 0, 0, $back_page);

    }

    if($cur_page < $num_pages){

        $next_page_number =  $cur_page+1;

        $next_page = '<a href="'.$link_to.'&p='.$next_page_number.'">--»</a>';

        array_push($pages, $next_page);

    }

}

    return implode(' ', $pages);

}





//

// Display a message

//

function message($message, $no_back_link = false)

{

    global $db, $lang_common, $pun_config, $pun_start, $tpl_main;



    if (!defined('PUN_HEADER'))

    {

        global $pun_user;



        $page_title = pun_htmlspecialchars($pun_config['o_board_title']).' / '.$lang_common['Info'];

        require PUN_ROOT.'header.php';

    }



?>



<div id="msg" class="block">

    <h2><span><?php echo $lang_common['Info'] ?></span></h2>

    <div class="box">

        <div class="inbox">

        <p><?php echo $message ?></p>

<?php if (!$no_back_link): ?>        <p><a href="javascript: history.go(-1)"><?php echo $lang_common['Go back'] ?></a></p>

<?php endif; ?>        </div>

    </div>

</div>

<?php



    require PUN_ROOT.'footer.php';

}





//

// Format a time string according to $time_format and timezones

//

function format_time($timestamp, $date_only = false)

{

    global $pun_config, $lang_common, $pun_user;



    if ($timestamp == '')

        return $lang_common['Never'];



    $diff = ($pun_user['timezone'] - $pun_config['o_server_timezone']) * 3600;

    $timestamp += $diff;

    $now = time();



    $date = date($pun_config['o_date_format'], $timestamp);

    $today = date($pun_config['o_date_format'], $now+$diff);

    $yesterday = date($pun_config['o_date_format'], $now+$diff-86400);



    if ($date == $today)

        $date = $lang_common['Today'];

    else if ($date == $yesterday)

        $date = $lang_common['Yesterday'];



    if (!$date_only)

        return $date.' '.date($pun_config['o_time_format'], $timestamp);

    else

        return $date;

}





//

// If we are running pre PHP 4.3.0, we add our own implementation of file_get_contents

//

if (!function_exists('file_get_contents'))

{

    function file_get_contents($filename, $use_include_path = 0)

    {

        $data = '';



        if ($fh = fopen($filename, 'rb', $use_include_path))

        {

            $data = fread($fh, filesize($filename));

            fclose($fh);

        }



        return $data;

    }

}





//

// Make sure that HTTP_REFERER matches $pun_config['o_base_url']/$script

//

function confirm_referrer($script)

{

    global $pun_config, $lang_common;



    if (!preg_match('#^'.preg_quote(str_replace('www.', '', $pun_config['o_base_url']).'/'.$script, '#').'#i', str_replace('www.', '', (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : ''))))

        message($lang_common['Bad referrer']);

}





//

// Generate a random password of length $len

//

function random_pass($len)

{

    $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';



    $password = '';

    for ($i = 0; $i < $len; ++$i)

        $password .= substr($chars, (mt_rand() % strlen($chars)), 1);



    return $password;

}





//

// Compute a hash of $str

// Uses sha1() if available. If not, SHA1 through mhash() if available. If not, fall back on md5().

//

function pun_hash($str)

{

    if (function_exists('sha1'))    // Only in PHP 4.3.0+

        return sha1($str);

    else if (function_exists('mhash'))    // Only if Mhash library is loaded

        return bin2hex(mhash(MHASH_SHA1, $str));

    else

        return md5($str);

}





//

// Try to determine the correct remote IP-address

//

function get_remote_address()

{

    return $_SERVER['REMOTE_ADDR'];

}





//

// Equivalent to htmlspecialchars(), but allows &#[0-9]+ (for unicode)

//

function pun_htmlspecialchars($str)

{

    $str = preg_replace('/&(?!#[0-9]+;)/s', '&', $str);

    $str = str_replace(array('<', '>', '"'), array('<', '>', '"'), $str);



    return $str;

}





//

// Equivalent to strlen(), but counts &#[0-9]+ as one character (for unicode)

//

function pun_strlen($str)

{

    return strlen(preg_replace('/&#([0-9]+);/', '!', $str));

}





//

// Convert \r\n and \r to \n

//

function pun_linebreaks($str)

{

    return str_replace("\r", "\n", str_replace("\r\n", "\n", $str));

}





//

// A more aggressive version of trim()

//

function pun_trim($str)

{

    global $lang_common;



    if (strpos($lang_common['lang_encoding'], '8859') !== false)

    {

        $fishy_chars = array(chr(0x81), chr(0x8D), chr(0x8F), chr(0x90), chr(0x9D), chr(0xA0));

        return trim(str_replace($fishy_chars, ' ', $str));

    }

    else

        return trim($str);

}





//

// Display a message when board is in maintenance mode

//

function maintenance_message()

{

    global $db, $pun_config, $lang_common, $pun_user;



    // Deal with newlines, tabs and multiple spaces

    $pattern = array("\t", '  ', '  ');

    $replace = array('    ', '  ', '  ');

    $message = str_replace($pattern, $replace, $pun_config['o_maintenance_message']);





    // Load the maintenance template

    $tpl_maint = trim(file_get_contents(PUN_ROOT.'include/template/maintenance.tpl'));





    // START SUBST - <pun_content_direction>

    $tpl_maint = str_replace('<pun_content_direction>', $lang_common['lang_direction'], $tpl_maint);

    // END SUBST - <pun_content_direction>





    // START SUBST - <pun_char_encoding>

    $tpl_maint = str_replace('<pun_char_encoding>', $lang_common['lang_encoding'], $tpl_maint);

    // END SUBST - <pun_char_encoding>





    // START SUBST - <pun_head>

    ob_start();



?>

<title><?php echo pun_htmlspecialchars($pun_config['o_board_title']).' / '.$lang_common['Maintenance'] ?></title>

<link rel="stylesheet" type="text/css" href="style/<?php echo $pun_user['style'].'.css' ?>" />

<?php



    $tpl_temp = trim(ob_get_contents());

    $tpl_maint = str_replace('<pun_head>', $tpl_temp, $tpl_maint);

    ob_end_clean();

    // END SUBST - <pun_head>





    // START SUBST - <pun_maint_heading>

    $tpl_maint = str_replace('<pun_maint_heading>', $lang_common['Maintenance'], $tpl_maint);

    // END SUBST - <pun_maint_heading>





    // START SUBST - <pun_maint_message>

    $tpl_maint = str_replace('<pun_maint_message>', $message, $tpl_maint);

    // END SUBST - <pun_maint_message>





    // End the transaction

    $db->end_transaction();





    // START SUBST - <pun_include "*">

    while (preg_match('#<pun_include "([^/\\\\]*?)">#', $tpl_maint, $cur_include))

    {

        if (!file_exists(PUN_ROOT.'include/user/'.$cur_include[1]))

            error('Unable to process user include <pun_include "'.htmlspecialchars($cur_include[1]).'"> from template maintenance.tpl. There is no such file in folder /include/user/');



        ob_start();

        include PUN_ROOT.'include/user/'.$cur_include[1];

        $tpl_temp = ob_get_contents();

        $tpl_maint = str_replace($cur_include[0], $tpl_temp, $tpl_maint);

        ob_end_clean();

    }

    // END SUBST - <pun_include "*">





    // Close the db connection (and free up any result data)

    $db->close();



    exit($tpl_maint);

}





//

// Display $message and redirect user to $destination_url

//

function redirect($destination_url, $message)

{

    global $db, $pun_config, $lang_common, $pun_user;



    if ($destination_url == '')

        $destination_url = 'index.php';



    // If the delay is 0 seconds, we might as well skip the redirect all together

    if ($pun_config['o_redirect_delay'] == '0')

        header('Location: '.str_replace('&', '&', $destination_url));





    // Load the redirect template

    $tpl_redir = trim(file_get_contents(PUN_ROOT.'include/template/redirect.tpl'));





    // START SUBST - <pun_content_direction>

    $tpl_redir = str_replace('<pun_content_direction>', $lang_common['lang_direction'], $tpl_redir);

    // END SUBST - <pun_content_direction>





    // START SUBST - <pun_char_encoding>

    $tpl_redir = str_replace('<pun_char_encoding>', $lang_common['lang_encoding'], $tpl_redir);

    // END SUBST - <pun_char_encoding>





    // START SUBST - <pun_head>

    ob_start();



?>

<meta http-equiv="refresh" content="<?php echo $pun_config['o_redirect_delay'] ?>;URL=<?php echo str_replace(array('<', '>', '"'), array('<', '>', '"'), $destination_url) ?>" />

<title><?php echo pun_htmlspecialchars($pun_config['o_board_title']).' / '.$lang_common['Redirecting'] ?></title>

<link rel="stylesheet" type="text/css" href="style/<?php echo $pun_user['style'].'.css' ?>" />

<?php



    $tpl_temp = trim(ob_get_contents());

    $tpl_redir = str_replace('<pun_head>', $tpl_temp, $tpl_redir);

    ob_end_clean();

    // END SUBST - <pun_head>





    // START SUBST - <pun_redir_heading>

    $tpl_redir = str_replace('<pun_redir_heading>', $lang_common['Redirecting'], $tpl_redir);

    // END SUBST - <pun_redir_heading>





    // START SUBST - <pun_redir_text>

    $tpl_temp = $message.'<br /><br />'.'<a href="'.$destination_url.'">'.$lang_common['Click redirect'].'</a>';

    $tpl_redir = str_replace('<pun_redir_text>', $tpl_temp, $tpl_redir);

    // END SUBST - <pun_redir_text>





    // START SUBST - <pun_footer>

    ob_start();



    // End the transaction

    $db->end_transaction();



    // Display executed queries (if enabled)

    if (defined('PUN_SHOW_QUERIES'))

        display_saved_queries();



    $tpl_temp = trim(ob_get_contents());

    $tpl_redir = str_replace('<pun_footer>', $tpl_temp, $tpl_redir);

    ob_end_clean();

    // END SUBST - <pun_footer>





    // START SUBST - <pun_include "*">

    while (preg_match('#<pun_include "([^/\\\\]*?)">#', $tpl_redir, $cur_include))

    {

        if (!file_exists(PUN_ROOT.'include/user/'.$cur_include[1]))

            error('Unable to process user include <pun_include "'.htmlspecialchars($cur_include[1]).'"> from template redirect.tpl. There is no such file in folder /include/user/');



        ob_start();

        include PUN_ROOT.'include/user/'.$cur_include[1];

        $tpl_temp = ob_get_contents();

        $tpl_redir = str_replace($cur_include[0], $tpl_temp, $tpl_redir);

        ob_end_clean();

    }

    // END SUBST - <pun_include "*">





    // Close the db connection (and free up any result data)

    $db->close();



    exit($tpl_redir);

}





//

// Display a simple error message

//

function error($message, $file, $line, $db_error = false)

{

    global $pun_config;



    // Set a default title if the script failed before $pun_config could be populated

    if (empty($pun_config))

        $pun_config['o_board_title'] = 'PunBB';



    // Empty output buffer and stop buffering

    @ob_end_clean();



    // "Restart" output buffering if we are using ob_gzhandler (since the gzip header is already sent)

    if (!empty($pun_config['o_gzip']) && extension_loaded('zlib') && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false || strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate') !== false))

        ob_start('ob_gzhandler');



?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html dir="ltr">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

<title><?php echo pun_htmlspecialchars($pun_config['o_board_title']) ?> / Error</title>

<style type="text/css">

<!--

BODY {MARGIN: 10% 20% auto 20%; font: 10px Verdana, Arial, Helvetica, sans-serif}

#errorbox {BORDER: 1px solid #B84623}

H2 {MARGIN: 0; COLOR: #FFFFFF; BACKGROUND-COLOR: #B84623; FONT-SIZE: 1.1em; PADDING: 5px 4px}

#errorbox DIV {PADDING: 6px 5px; BACKGROUND-COLOR: #F1F1F1}

-->

</style>

</head>

<body>



<div id="errorbox">

    <h2>An error was encountered</h2>

    <div>

<?php



    if (defined('PUN_DEBUG'))

    {

        echo "\t\t".'<strong>File:</strong> '.$file.'<br />'."\n\t\t".'<strong>Line:</strong> '.$line.'<br /><br />'."\n\t\t".'<strong>PunBB reported</strong>: '.$message."\n";



        if ($db_error)

        {

            echo "\t\t".'<br /><br /><strong>Database reported:</strong> '.pun_htmlspecialchars($db_error['error_msg']).(($db_error['error_no']) ? ' (Errno: '.$db_error['error_no'].')' : '')."\n";



            if ($db_error['error_sql'] != '')

                echo "\t\t".'<br /><br /><strong>Failed query:</strong> '.pun_htmlspecialchars($db_error['error_sql'])."\n";

        }

    }

    else

        echo "\t\t".'Error: <strong>'.$message.'.</strong>'."\n";



?>

    </div>

</div>



</body>

</html>

<?php



    // If a database connection was established (before this error) we close it

    if ($db_error)

        $GLOBALS['db']->close();



    exit;

}



// DEBUG FUNCTIONS BELOW



//

// Display executed queries (if enabled)

//

function display_saved_queries()

{

    global $db, $lang_common;



    // Get the queries so that we can print them out

    $saved_queries = $db->get_saved_queries();



?>



<div id="debug" class="blocktable">

    <h2><span><?php echo $lang_common['Debug table'] ?></span></h2>

    <div class="box">

        <div class="inbox">

            <table cellspacing="0">

            <thead>

                <tr>

                    <th class="tcl" scope="col">Time (s)</th>

                    <th class="tcr" scope="col">Query</th>

                </tr>

            </thead>

            <tbody>

<?php



    $query_time_total = 0.0;

    while (list(, $cur_query) = @each($saved_queries))

    {

        $query_time_total += $cur_query[1];



?>

                <tr>

                    <td class="tcl"><?php echo ($cur_query[1] != 0) ? $cur_query[1] : ' ' ?></td>

                    <td class="tcr"><?php echo pun_htmlspecialchars($cur_query[0]) ?></td>

                </tr>

<?php



    }



?>

                <tr>

                    <td class="tcl" colspan="2">Total query time: <?php echo $query_time_total ?> s</td>

                </tr>

            </tbody>

            </table>

        </div>

    </div>

</div>

<?php



}





//

// Unset any variables instantiated as a result of register_globals being enabled

//

function unregister_globals()

{

    // Prevent script.php?GLOBALS[foo]=bar

    if (isset($_REQUEST['GLOBALS']) || isset($_FILES['GLOBALS']))

        exit('I\'ll have a steak sandwich and... a steak sandwich.');

    

    // Variables that shouldn't be unset

    $no_unset = array('GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST', '_SERVER', '_ENV', '_FILES');



    // Remove elements in $GLOBALS that are present in any of the superglobals

    $input = array_merge($_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset($_SESSION) && is_array($_SESSION) ? $_SESSION : array());

    foreach ($input as $k => $v)

    {

        if (!in_array($k, $no_unset) && isset($GLOBALS[$k]))

               {

            unset($GLOBALS[$k]);

                   unset($GLOBALS[$k]);    // Double unset to circumvent the zend_hash_del_key_or_index hole in PHP <4.4.3 and <5.1.4

               }

    }

}





//

// Dump contents of variable(s)

//

function dump()

{

    echo '<pre>';



    $num_args = func_num_args();



    for ($i = 0; $i < $num_args; ++$i)

    {

        print_r(func_get_arg($i));

        echo "\n\n";

    }



    echo '</pre>';

    exit;

}