diff -r 000000000000 -r f9ffdbd96607 punbb/include/functions.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/punbb/include/functions.php	Wed Jul 11 21:01:48 2007 -0400
@@ -0,0 +1,1110 @@
+<?php
+/***********************************************************************
+
+  Copyright (C) 2002-2005  Rickard Andersson (rickard@punbb.org)
+
+  This file is part of PunBB.
+
+  PunBB is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+
+  PunBB is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+  MA  02111-1307  USA
+
+************************************************************************/
+
+//
+// Cookie stuff!
+//
+function check_cookie(&$pun_user)
+{
+	global $db, $db_type, $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'])
+			{
+				$pun_user['logged'] = $now;
+
+				// With MySQL/MySQLi, REPLACE INTO avoids a user having two rows in the online table
+				switch ($db_type)
+				{
+					case 'mysql':
+					case 'mysqli':
+						$db->query('REPLACE INTO '.$db->prefix.'online (user_id, ident, logged) VALUES('.$pun_user['id'].', \''.$db->escape($pun_user['username']).'\', '.$pun_user['logged'].')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());
+						break;
+
+					default:
+						$db->query('INSERT INTO '.$db->prefix.'online (user_id, ident, logged) VALUES('.$pun_user['id'].', \''.$db->escape($pun_user['username']).'\', '.$pun_user['logged'].')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());
+						break;
+				}
+			}
+			else
+			{
+				// Special case: We've timed out, but no other user has browsed the forums since we timed out
+				if ($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, $db_type, $pun_user, $pun_config;
+
+	$remote_addr = get_remote_address();
+
+	// Fetch guest user
+	$result = $db->query('SELECT u.*, g.*, o.logged FROM '.$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'])
+	{
+		$pun_user['logged'] = time();
+
+		// With MySQL/MySQLi, REPLACE INTO avoids a user having two rows in the online table
+		switch ($db_type)
+		{
+			case 'mysql':
+			case 'mysqli':
+				$db->query('REPLACE INTO '.$db->prefix.'online (user_id, ident, logged) VALUES(1, \''.$db->escape($remote_addr).'\', '.$pun_user['logged'].')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());
+				break;
+
+			default:
+				$db->query('INSERT INTO '.$db->prefix.'online (user_id, ident, logged) VALUES(1, \''.$db->escape($remote_addr).'\', '.$pun_user['logged'].')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error());
+				break;
+		}
+	}
+	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>';
+	$links[] = '<li id="navuserlist"><a href="userlist.php">'.$lang_common['User list'].'</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>';
+			$links[] = '<li id="navlogout"><a href="login.php?action=out&amp;id='.$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>';
+			$links[] = '<li id="navlogout"><a href="login.php?action=out&amp;id='.$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&amp;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&amp;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&amp;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&amp;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&amp;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&amp;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&amp;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;
+
+	// If $cur_page == -1, we link to all pages (used in viewforum.php)
+	if ($cur_page == -1)
+	{
+		$cur_page = 1;
+		$link_to_all = true;
+	}
+
+	if ($num_pages <= 1)
+		$pages = array('<strong>1</strong>');
+	else
+	{
+		if ($cur_page > 3)
+		{
+			$pages[] = '<a href="'.$link_to.'&amp;p=1">1</a>';
+
+			if ($cur_page != 4)
+				$pages[] = '&hellip;';
+		}
+
+		// Don't ask me how the following works. It just does, OK? :-)
+		for ($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.'&amp;p='.$current.'">'.$current.'</a>';
+			else
+				$pages[] = '<strong>'.$current.'</strong>';
+		}
+
+		if ($cur_page <= ($num_pages-3))
+		{
+			if ($cur_page != ($num_pages-3))
+				$pages[] = '&hellip;';
+
+			$pages[] = '<a href="'.$link_to.'&amp;p='.$num_pages.'">'.$num_pages.'</a>';
+		}
+	}
+
+	return implode('&nbsp;', $pages);
+}
+
+
+//
+// Display a message
+//
+function message($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', '&amp;', $str);
+	$str = str_replace(array('<', '>', '"'), array('&lt;', '&gt;', '&quot;'), $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('&nbsp; &nbsp; ', '&nbsp; ', ' &nbsp;');
+	$message = str_replace($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_include "*">
+	while (preg_match('#<pun_include "([^/\\\\]*?)\.(php[45]?|inc|html?|txt)">#', $tpl_maint, $cur_include))
+	{
+		if (!file_exists(PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2]))
+			error('Unable to process user include '.htmlspecialchars($cur_include[0]).' from template maintenance.tpl. There is no such file in folder /include/user/');
+
+		ob_start();
+		include PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2];
+		$tpl_temp = ob_get_contents();
+		$tpl_maint = str_replace($cur_include[0], $tpl_temp, $tpl_maint);
+	    ob_end_clean();
+	}
+	// END SUBST - <pun_include "*">
+
+
+	// 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();
+
+
+	// 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('&amp;', '&', $destination_url));
+
+
+	// Load the redirect template
+	$tpl_redir = trim(file_get_contents(PUN_ROOT.'include/template/redirect.tpl'));
+
+
+	// START SUBST - <pun_include "*">
+	while (preg_match('#<pun_include "([^/\\\\]*?)\.(php[45]?|inc|html?|txt)">#', $tpl_redir, $cur_include))
+	{
+		if (!file_exists(PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2]))
+			error('Unable to process user include '.htmlspecialchars($cur_include[0]).' from template redirect.tpl. There is no such file in folder /include/user/');
+
+		ob_start();
+		include PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2];
+		$tpl_temp = ob_get_contents();
+		$tpl_redir = str_replace($cur_include[0], $tpl_temp, $tpl_redir);
+	    ob_end_clean();
+	}
+	// END SUBST - <pun_include "*">
+
+
+	// 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('&lt;', '&gt;', '&quot;'), $destination_url) ?>" />
+<title><?php echo pun_htmlspecialchars($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>
+
+
+	// 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 xmlns="http://www.w3.org/1999/xhtml" dir="ltr">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
+<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) ? $cur_query[1] : '&nbsp;' ?></td>
+					<td class="tcr"><?php echo pun_htmlspecialchars($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()
+{
+	$register_globals = @ini_get('register_globals');
+	if ($register_globals === "" || $register_globals === "0" || strtolower($register_globals === "off"))
+		return;
+
+	// 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;
+}