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Diffstat (limited to 'include/functions.php')
| -rw-r--r-- | include/functions.php | 2227 |
1 files changed, 2227 insertions, 0 deletions
diff --git a/include/functions.php b/include/functions.php new file mode 100644 index 0000000..ace2934 --- /dev/null +++ b/include/functions.php @@ -0,0 +1,2227 @@ +<?php + +/** + * Copyright (C) 2008-2012 FluxBB + * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB + * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher + */ + + + +// +// Return current timestamp (with microseconds) as a float +// +function get_microtime() +{ + list($usec, $sec) = explode(' ', microtime()); + return ((float)$usec + (float)$sec); +} + +// +// Cookie stuff! +// +function check_cookie(&$pun_user) +{ + global $db, $db_type, $pun_config, $cookie_name, $cookie_seed; + + $now = time(); + + // If the cookie is set and it matches the correct pattern, then read the values from it + if (isset($_COOKIE[$cookie_name]) && preg_match('%^(\d+)\|([0-9a-fA-F]+)\|(\d+)\|([0-9a-fA-F]+)$%', $_COOKIE[$cookie_name], $matches)) + { + $cookie = array( + 'user_id' => intval($matches[1]), + 'password_hash' => $matches[2], + 'expiration_time' => intval($matches[3]), + 'cookie_hash' => $matches[4], + ); + } + + // If it has a non-guest user, and hasn't expired + if (isset($cookie) && $cookie['user_id'] > 1 && $cookie['expiration_time'] > $now) + { + // If the cookie has been tampered with + $is_authorized = pun_hash_equals(forum_hmac($cookie['user_id'].'|'.$cookie['expiration_time'], $cookie_seed.'_cookie_hash'), $cookie['cookie_hash']); + if (!$is_authorized) + { + $expire = $now + 31536000; // The cookie expires after a year + pun_setcookie(1, pun_hash(uniqid(rand(), true)), $expire); + set_default_user(); + + return; + } + + // 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 + $is_authorized = pun_hash_equals(forum_hmac($pun_user['password'], $cookie_seed.'_password_hash'), $cookie['password_hash']); + if (!isset($pun_user['id']) || !$is_authorized) + { + $expire = $now + 31536000; // The cookie expires after a year + pun_setcookie(1, pun_hash(uniqid(rand(), true)), $expire); + set_default_user(); + + return; + } + + // Send a new, updated cookie with a new expiration timestamp + $expire = ($cookie['expiration_time'] > $now + $pun_config['o_timeout_visit']) ? $now + 1209600 : $now + $pun_config['o_timeout_visit']; + pun_setcookie($pun_user['id'], $pun_user['password'], $expire); + + // Set a default language if the user selected language no longer exists + if (!file_exists(PUN_ROOT.'lang/'.$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'] = $pun_config['o_disp_posts_default']; + + // Define this if you want this visit to affect the online list and the users last visit data + if (!defined('PUN_QUIET_VISIT')) + { + // Update the online list + if (!$pun_user['logged']) + { + $pun_user['logged'] = $now; + + // With MySQL/MySQLi/SQLite, REPLACE INTO avoids a user having two rows in the online table + switch ($db_type) + { + case 'mysql': + case 'mysqli': + case 'mysql_innodb': + case 'mysqli_innodb': + case 'sqlite': + $db->query('REPLACE INTO '.$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) SELECT '.$pun_user['id'].', \''.$db->escape($pun_user['username']).'\', '.$pun_user['logged'].' WHERE NOT EXISTS (SELECT 1 FROM '.$db->prefix.'online WHERE user_id='.$pun_user['id'].')') or error('Unable to insert into online list', __FILE__, __LINE__, $db->error()); + break; + } + + // Reset tracked topics + set_tracked_topics(null); + } + else + { + // Special case: We've timed out, but no other user has browsed the forums since we timed out + if ($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__, $db->error()); + + // Update tracked topics with the current expire time + if (isset($_COOKIE[$cookie_name.'_track'])) + forum_setcookie($cookie_name.'_track', $_COOKIE[$cookie_name.'_track'], $now + $pun_config['o_timeout_visit']); + } + } + else + { + if (!$pun_user['logged']) + $pun_user['logged'] = $pun_user['last_visit']; + } + + $pun_user['is_guest'] = false; + $pun_user['is_admmod'] = $pun_user['g_id'] == PUN_ADMIN || $pun_user['g_moderator'] == '1'; + } + else + set_default_user(); +} + + +// +// Converts the CDATA end sequence ]]> into ]]> +// +function escape_cdata($str) +{ + return str_replace(']]>', ']]>', $str); +} + + +// +// Authenticates the provided username and password against the user database +// $user can be either a user ID (integer) or a username (string) +// $password can be either a plaintext password or a password hash including salt ($password_is_hash must be set accordingly) +// +function authenticate_user($user, $password, $password_is_hash = false) +{ + global $db, $pun_user; + + // Check if there's a user matching $user and $password + $result = $db->query('SELECT u.*, g.*, o.logged, o.idle FROM '.$db->prefix.'users AS u INNER JOIN '.$db->prefix.'groups AS g ON g.g_id=u.group_id LEFT JOIN '.$db->prefix.'online AS o ON o.user_id=u.id WHERE '.(is_int($user) ? 'u.id='.intval($user) : 'u.username=\''.$db->escape($user).'\'')) or error('Unable to fetch user info', __FILE__, __LINE__, $db->error()); + $pun_user = $db->fetch_assoc($result); + + $is_password_authorized = pun_hash_equals($password, $pun_user['password']); + $is_hash_authorized = pun_hash_equals(pun_hash($password), $pun_user['password']); + + if (!isset($pun_user['id']) || + ($password_is_hash && !$is_password_authorized || + (!$password_is_hash && !$is_hash_authorized))) + set_default_user(); + else + $pun_user['is_guest'] = false; +} + + +// +// Try to determine the current URL +// +function get_current_url($max_length = 0) +{ + $protocol = get_current_protocol(); + $port = (isset($_SERVER['SERVER_PORT']) && (($_SERVER['SERVER_PORT'] != '80' && $protocol == 'http') || ($_SERVER['SERVER_PORT'] != '443' && $protocol == 'https')) && strpos($_SERVER['HTTP_HOST'], ':') === false) ? ':'.$_SERVER['SERVER_PORT'] : ''; + + $url = urldecode($protocol.'://'.$_SERVER['HTTP_HOST'].$port.$_SERVER['REQUEST_URI']); + + if (strlen($url) <= $max_length || $max_length == 0) + return $url; + + // We can't find a short enough url + return null; +} + + +// +// Fetch the current protocol in use - http or https +// +function get_current_protocol() +{ + $protocol = 'http'; + + // Check if the server is claiming to using HTTPS + if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') + $protocol = 'https'; + + // If we are behind a reverse proxy try to decide which protocol it is using + if (defined('FORUM_BEHIND_REVERSE_PROXY')) + { + // Check if we are behind a Microsoft based reverse proxy + if (!empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) != 'off') + $protocol = 'https'; + + // Check if we're behind a "proper" reverse proxy, and what protocol it's using + if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) + $protocol = strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']); + } + + return $protocol; +} + + +// +// Fetch the base_url, optionally support HTTPS and HTTP +// +function get_base_url($support_https = false) +{ + global $pun_config; + static $base_url; + + if (!$support_https) + return $pun_config['o_base_url']; + + if (!isset($base_url)) + { + // Make sure we are using the correct protocol + $base_url = str_replace(array('http://', 'https://'), get_current_protocol().'://', $pun_config['o_base_url']); + } + + return $base_url; +} + + +// +// Fetch admin IDs +// +function get_admin_ids() +{ + if (file_exists(FORUM_CACHE_DIR.'cache_admins.php')) + include FORUM_CACHE_DIR.'cache_admins.php'; + + if (!defined('PUN_ADMINS_LOADED')) + { + if (!defined('FORUM_CACHE_FUNCTIONS_LOADED')) + require PUN_ROOT.'include/cache.php'; + + generate_admins_cache(); + require FORUM_CACHE_DIR.'cache_admins.php'; + } + + return $pun_admins; +} + + +// +// 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 = $db->query('SELECT u.*, g.*, o.logged, o.last_post, o.last_search FROM '.$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=\''.$db->escape($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. Your database must contain both a guest user and a guest user group.'); + + $pun_user = $db->fetch_assoc($result); + + // Update online list + if (!$pun_user['logged']) + { + $pun_user['logged'] = time(); + + // With MySQL/MySQLi/SQLite, REPLACE INTO avoids a user having two rows in the online table + switch ($db_type) + { + case 'mysql': + case 'mysqli': + case 'mysql_innodb': + case 'mysqli_innodb': + case 'sqlite': + $db->query('REPLACE INTO '.$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) SELECT 1, \''.$db->escape($remote_addr).'\', '.$pun_user['logged'].' WHERE NOT EXISTS (SELECT 1 FROM '.$db->prefix.'online WHERE ident=\''.$db->escape($remote_addr).'\')') 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_default_timezone']; + $pun_user['dst'] = $pun_config['o_default_dst']; + $pun_user['language'] = $pun_config['o_default_lang']; + $pun_user['style'] = $pun_config['o_default_style']; + $pun_user['is_guest'] = true; + $pun_user['is_admmod'] = false; +} + + +// +// SHA1 HMAC with PHP 4 fallback +// +function forum_hmac($data, $key, $raw_output = false) +{ + if (function_exists('hash_hmac')) + return hash_hmac('sha1', $data, $key, $raw_output); + + // If key size more than blocksize then we hash it once + if (strlen($key) > 64) + $key = pack('H*', sha1($key)); // we have to use raw output here to match the standard + + // Ensure we're padded to exactly one block boundary + $key = str_pad($key, 64, chr(0x00)); + + $hmac_opad = str_repeat(chr(0x5C), 64); + $hmac_ipad = str_repeat(chr(0x36), 64); + + // Do inner and outer padding + for ($i = 0;$i < 64;$i++) { + $hmac_opad[$i] = $hmac_opad[$i] ^ $key[$i]; + $hmac_ipad[$i] = $hmac_ipad[$i] ^ $key[$i]; + } + + // Finally, calculate the HMAC + $hash = sha1($hmac_opad.pack('H*', sha1($hmac_ipad.$data))); + + // If we want raw output then we need to pack the final result + if ($raw_output) + $hash = pack('H*', $hash); + + return $hash; +} + + +// +// Set a cookie, FluxBB style! +// Wrapper for forum_setcookie +// +function pun_setcookie($user_id, $password_hash, $expire) +{ + global $cookie_name, $cookie_seed; + + forum_setcookie($cookie_name, $user_id.'|'.forum_hmac($password_hash, $cookie_seed.'_password_hash').'|'.$expire.'|'.forum_hmac($user_id.'|'.$expire, $cookie_seed.'_cookie_hash'), $expire); +} + + +// +// Set a cookie, FluxBB style! +// +function forum_setcookie($name, $value, $expire) +{ + global $cookie_path, $cookie_domain, $cookie_secure, $pun_config; + + if ($expire - time() - $pun_config['o_timeout_visit'] < 1) + $expire = 0; + + // Enable sending of a P3P header + header('P3P: CP="CUR ADM"'); + + if (version_compare(PHP_VERSION, '5.2.0', '>=')) + setcookie($name, $value, $expire, $cookie_path, $cookie_domain, $cookie_secure, true); + else + setcookie($name, $value, $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, $pun_bans; + + // Admins and moderators aren't affected + if ($pun_user['is_admmod'] || !$pun_bans) + return; + + // Add a dot or a colon (depending on IPv4/IPv6) 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(); + $user_ip .= (strpos($user_ip, '.') !== false) ? '.' : ':'; + + $bans_altered = false; + $is_banned = false; + + foreach ($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'] != '' && utf8_strtolower($pun_user['username']) == utf8_strtolower($cur_ban['username'])) + $is_banned = true; + + if ($cur_ban['ip'] != '') + { + $cur_ban_ips = explode(' ', $cur_ban['ip']); + + $num_ips = count($cur_ban_ips); + for ($i = 0; $i < $num_ips; ++$i) + { + // Add the proper ending to the ban + if (strpos($user_ip, '.') !== false) + $cur_ban_ips[$i] = $cur_ban_ips[$i].'.'; + else + $cur_ban_ips[$i] = $cur_ban_ips[$i].':'; + + if (substr($user_ip, 0, strlen($cur_ban_ips[$i])) == $cur_ban_ips[$i]) + { + $is_banned = true; + break; + } + } + } + + if ($is_banned) + { + $db->query('DELETE FROM '.$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 />').$lang_common['Ban message 4'].' <a href="mailto:'.pun_htmlspecialchars($pun_config['o_admin_email']).'">'.pun_htmlspecialchars($pun_config['o_admin_email']).'</a>.', true); + } + } + + // If we removed any expired bans during our run-through, we need to regenerate the bans cache + if ($bans_altered) + { + if (!defined('FORUM_CACHE_FUNCTIONS_LOADED')) + require PUN_ROOT.'include/cache.php'; + + generate_bans_cache(); + } +} + + +// +// Check username +// +function check_username($username, $exclude_id = null) +{ + global $db, $pun_config, $errors, $lang_prof_reg, $lang_register, $lang_common, $pun_bans; + + // Include UTF-8 function + require_once PUN_ROOT.'include/utf8/strcasecmp.php'; + + // Convert multiple whitespace characters into one (to prevent people from registering with indistinguishable usernames) + $username = preg_replace('%\s+%s', ' ', $username); + + // Validate username + if (pun_strlen($username) < 2) + $errors[] = $lang_prof_reg['Username too short']; + else if (pun_strlen($username) > 25) // This usually doesn't happen since the form element only accepts 25 characters + $errors[] = $lang_prof_reg['Username too long']; + else if (!strcasecmp($username, 'Guest') || !utf8_strcasecmp($username, $lang_common['Guest'])) + $errors[] = $lang_prof_reg['Username guest']; + else if (preg_match('%[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}%', $username) || preg_match('%((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))%', $username)) + $errors[] = $lang_prof_reg['Username IP']; + else if ((strpos($username, '[') !== false || strpos($username, ']') !== false) && strpos($username, '\'') !== false && strpos($username, '"') !== false) + $errors[] = $lang_prof_reg['Username reserved chars']; + else if (preg_match('%(?:\[/?(?:b|u|s|ins|del|em|i|h|colou?r|quote|code|img|url|email|list|\*|topic|post|forum|user)\]|\[(?:img|url|quote|list)=)%i', $username)) + $errors[] = $lang_prof_reg['Username BBCode']; + + // Check username for any censored words + if ($pun_config['o_censoring'] == '1' && censor_words($username) != $username) + $errors[] = $lang_register['Username censor']; + + // Check that the username (or a too similar username) is not already registered + $query = (!is_null($exclude_id)) ? ' AND id!='.$exclude_id : ''; + + $result = $db->query('SELECT username FROM '.$db->prefix.'users WHERE (UPPER(username)=UPPER(\''.$db->escape($username).'\') OR UPPER(username)=UPPER(\''.$db->escape(ucp_preg_replace('%[^\p{L}\p{N}]%u', '', $username)).'\')) AND id>1'.$query) or error('Unable to fetch user info', __FILE__, __LINE__, $db->error()); + + if ($db->num_rows($result)) + { + $busy = $db->result($result); + $errors[] = $lang_register['Username dupe 1'].' '.pun_htmlspecialchars($busy).'. '.$lang_register['Username dupe 2']; + } + + // Check username for any banned usernames + foreach ($pun_bans as $cur_ban) + { + if ($cur_ban['username'] != '' && utf8_strtolower($username) == utf8_strtolower($cur_ban['username'])) + { + $errors[] = $lang_prof_reg['Banned username']; + break; + } + } +} + + +// +// Update "Users online" +// +function update_users_online() +{ + global $db, $pun_config; + + $now = time(); + + // Fetch all online list entries that are older than "o_timeout_online" + $result = $db->query('SELECT user_id, ident, logged, idle FROM '.$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__, $db->error()); + } + } +} + + +// +// Display the profile navigation menu +// +function generate_profile_menu($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 $lang_profile['Section messaging'] ?></a></li> +<?php if ($pun_config['o_avatars'] == '1' || $pun_config['o_signatures'] == '1'): ?> <li<?php if ($page == 'personality') echo ' class="isactive"'; ?>><a href="profile.php?section=personality&id=<?php echo $id ?>"><?php echo $lang_profile['Section personality'] ?></a></li> +<?php endif; ?> <li<?php if ($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_moderator'] == '1' && $pun_user['g_mod_ban_users'] == '1')): ?> <li<?php if ($page == 'admin') echo ' class="isactive"'; ?>><a href="profile.php?section=admin&id=<?php echo $id ?>"><?php echo $lang_profile['Section admin'] ?></a></li> +<?php endif; ?> </ul> + </div> + </div> + </div> +<?php + +} + + +// +// Outputs markup to display a user's avatar +// +function generate_avatar_markup($user_id) +{ + global $pun_config; + + $filetypes = array('jpg', 'gif', 'png'); + $avatar_markup = ''; + + foreach ($filetypes as $cur_type) + { + $path = $pun_config['o_avatars_dir'].'/'.$user_id.'.'.$cur_type; + + if (file_exists(PUN_ROOT.$path) && $img_size = getimagesize(PUN_ROOT.$path)) + { + $avatar_markup = '<img src="'.pun_htmlspecialchars(get_base_url(true).'/'.$path.'?m='.filemtime(PUN_ROOT.$path)).'" '.$img_size[3].' alt="" />'; + break; + } + } + + return $avatar_markup; +} + + +// +// Generate browser's title +// +function generate_page_title($page_title, $p = null) +{ + global $lang_common; + + if (!is_array($page_title)) + $page_title = array($page_title); + + $page_title = array_reverse($page_title); + + if ($p > 1) + $page_title[0] .= ' ('.sprintf($lang_common['Page'], forum_number_format($p)).')'; + + $crumbs = implode($lang_common['Title separator'], $page_title); + + return $crumbs; +} + + +// +// Save array of tracked topics in cookie +// +function set_tracked_topics($tracked_topics) +{ + global $cookie_name, $cookie_path, $cookie_domain, $cookie_secure, $pun_config; + + $cookie_data = ''; + if (!empty($tracked_topics)) + { + // Sort the arrays (latest read first) + arsort($tracked_topics['topics'], SORT_NUMERIC); + arsort($tracked_topics['forums'], SORT_NUMERIC); + + // Homebrew serialization (to avoid having to run unserialize() on cookie data) + foreach ($tracked_topics['topics'] as $id => $timestamp) + $cookie_data .= 't'.$id.'='.$timestamp.';'; + foreach ($tracked_topics['forums'] as $id => $timestamp) + $cookie_data .= 'f'.$id.'='.$timestamp.';'; + + // Enforce a byte size limit (4096 minus some space for the cookie name - defaults to 4048) + if (strlen($cookie_data) > FORUM_MAX_COOKIE_SIZE) + { + $cookie_data = substr($cookie_data, 0, FORUM_MAX_COOKIE_SIZE); + $cookie_data = substr($cookie_data, 0, strrpos($cookie_data, ';')).';'; + } + } + + forum_setcookie($cookie_name.'_track', $cookie_data, time() + $pun_config['o_timeout_visit']); + $_COOKIE[$cookie_name.'_track'] = $cookie_data; // Set it directly in $_COOKIE as well +} + + +// +// Extract array of tracked topics from cookie +// +function get_tracked_topics() +{ + global $cookie_name; + + $cookie_data = isset($_COOKIE[$cookie_name.'_track']) ? $_COOKIE[$cookie_name.'_track'] : false; + if (!$cookie_data) + return array('topics' => array(), 'forums' => array()); + + if (strlen($cookie_data) > FORUM_MAX_COOKIE_SIZE) + return array('topics' => array(), 'forums' => array()); + + // Unserialize data from cookie + $tracked_topics = array('topics' => array(), 'forums' => array()); + $temp = explode(';', $cookie_data); + foreach ($temp as $t) + { + $type = substr($t, 0, 1) == 'f' ? 'forums' : 'topics'; + $id = intval(substr($t, 1)); + $timestamp = intval(substr($t, strpos($t, '=') + 1)); + if ($id > 0 && $timestamp > 0) + $tracked_topics[$type][$id] = $timestamp; + } + + return $tracked_topics; +} + + +// +// Shortcut method for executing all callbacks registered with the addon manager for the given hook +// +function flux_hook($name) +{ + global $flux_addons; + + $flux_addons->hook($name); +} + + +// +// Update posts, topics, last_post, last_post_id and last_poster for a forum +// +function update_forum($forum_id) +{ + global $db; + + $result = $db->query('SELECT COUNT(id), SUM(num_replies) FROM '.$db->prefix.'topics WHERE 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='.$num_topics.', num_posts='.$num_posts.', 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__, $db->error()); +} + + +// +// Deletes any avatars owned by the specified user ID +// +function delete_avatar($user_id) +{ + global $pun_config; + + $filetypes = array('jpg', 'gif', 'png'); + + // Delete user avatar + foreach ($filetypes as $cur_type) + { + if (file_exists(PUN_ROOT.$pun_config['o_avatars_dir'].'/'.$user_id.'.'.$cur_type)) + @unlink(PUN_ROOT.$pun_config['o_avatars_dir'].'/'.$user_id.'.'.$cur_type); + } +} + + +// +// Delete a topic and all of its posts +// +function delete_topic($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 IDs 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] : $row[0]; + + // Make sure we have a list of post IDs + if ($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.'topic_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()); +} + + +// +// Delete every .php file in the forum's cache directory +// +function forum_clear_cache() +{ + $d = dir(FORUM_CACHE_DIR); + while (($entry = $d->read()) !== false) + { + if (substr($entry, -4) == '.php') + @unlink(FORUM_CACHE_DIR.$entry); + } + $d->close(); +} + + +// +// 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)) + { + if (file_exists(FORUM_CACHE_DIR.'cache_censoring.php')) + include FORUM_CACHE_DIR.'cache_censoring.php'; + + if (!defined('PUN_CENSOR_LOADED')) + { + if (!defined('FORUM_CACHE_FUNCTIONS_LOADED')) + require PUN_ROOT.'include/cache.php'; + + generate_censoring_cache(); + require FORUM_CACHE_DIR.'cache_censoring.php'; + } + } + + if (!empty($search_for)) + $text = substr(ucp_preg_replace($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 $pun_bans, $lang_common; + static $ban_list; + + // If not already built in a previous call, build an array of lowercase banned usernames + if (empty($ban_list)) + { + $ban_list = array(); + + foreach ($pun_bans as $cur_ban) + $ban_list[] = utf8_strtolower($cur_ban['username']); + } + + // If the user is banned + if (in_array(utf8_strtolower($user['username']), $ban_list)) + $user_title = $lang_common['Banned']; + // If the user has a custom title + else if ($user['title'] != '') + $user_title = pun_htmlspecialchars($user['title']); + // 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']; + // If nothing else helps, we assign the default + else + $user_title = $lang_common['Member']; + + return $user_title; +} + + +// +// Generate a string with numbered links (for multipage scripts) +// +function paginate($num_pages, $cur_page, $link) +{ + global $lang_common; + + $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) + $pages = array('<strong class="item1">1</strong>'); + else + { + // Add a previous page link + if ($num_pages > 1 && $cur_page > 1) + $pages[] = '<a rel="prev"'.(empty($pages) ? ' class="item1"' : '').' href="'.$link.($cur_page == 2 ? '' : '&p='.($cur_page - 1)).'">'.$lang_common['Previous'].'</a>'; + + if ($cur_page > 3) + { + $pages[] = '<a'.(empty($pages) ? ' class="item1"' : '').' href="'.$link.'">1</a>'; + + if ($cur_page > 5) + $pages[] = '<span class="spacer">'.$lang_common['Spacer'].'</span>'; + } + + // Don't ask me how the following works. It just does, OK? :-) + for ($current = ($cur_page == 5) ? $cur_page - 3 : $cur_page - 2, $stop = ($cur_page + 4 == $num_pages) ? $cur_page + 4 : $cur_page + 3; $current < $stop; ++$current) + { + if ($current < 1 || $current > $num_pages) + continue; + else if ($current != $cur_page || $link_to_all) + $pages[] = '<a'.(empty($pages) ? ' class="item1"' : '').' href="'.$link.($current == 1 ? '' : '&p='.$current).'">'.forum_number_format($current).'</a>'; + else + $pages[] = '<strong'.(empty($pages) ? ' class="item1"' : '').'>'.forum_number_format($current).'</strong>'; + } + + if ($cur_page <= ($num_pages-3)) + { + if ($cur_page != ($num_pages-3) && $cur_page != ($num_pages-4)) + $pages[] = '<span class="spacer">'.$lang_common['Spacer'].'</span>'; + + $pages[] = '<a'.(empty($pages) ? ' class="item1"' : '').' href="'.$link.'&p='.$num_pages.'">'.forum_number_format($num_pages).'</a>'; + } + + // Add a next page link + if ($num_pages > 1 && !$link_to_all && $cur_page < $num_pages) + $pages[] = '<a rel="next"'.(empty($pages) ? ' class="item1"' : '').' href="'.$link.'&p='.($cur_page +1).'">'.$lang_common['Next'].'</a>'; + } + + return implode(' ', $pages); +} + + +// +// Display a message +// +function message($message, $no_back_link = false, $http_status = null) +{ + global $db, $lang_common, $pun_config, $pun_start, $tpl_main, $pun_user; + + // Did we receive a custom header? + if(!is_null($http_status)) { + header('HTTP/1.1 ' . $http_status); + } + + if (!defined('PUN_HEADER')) + { + $page_title = array(pun_htmlspecialchars($pun_config['o_board_title']), $lang_common['Info']); + define('PUN_ACTIVE_PAGE', 'index'); + 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 $time_format and time zones +// +function format_time($timestamp, $date_only = false, $date_format = null, $time_format = null, $time_only = false, $no_text = false, $user = null) +{ + global $lang_common, $pun_user, $forum_date_formats, $forum_time_formats; + + if ($timestamp == '') + return $lang_common['Never']; + + if (is_null($user)) + $user = $pun_user; + + $diff = ($user['timezone'] + $user['dst']) * 3600; + $timestamp += $diff; + $now = time(); + + if(is_null($date_format)) + $date_format = $forum_date_formats[$user['date_format']]; + + if(is_null($time_format)) + $time_format = $forum_time_formats[$user['time_format']]; + + $date = gmdate($date_format, $timestamp); + $today = gmdate($date_format, $now+$diff); + $yesterday = gmdate($date_format, $now+$diff-86400); + + if(!$no_text) + { + if ($date == $today) + $date = $lang_common['Today']; + else if ($date == $yesterday) + $date = $lang_common['Yesterday']; + } + + if ($date_only) + return $date; + else if ($time_only) + return gmdate($time_format, $timestamp); + else + return $date.' '.gmdate($time_format, $timestamp); +} + + +// +// A wrapper for PHP's number_format function +// +function forum_number_format($number, $decimals = 0) +{ + global $lang_common; + + return is_numeric($number) ? number_format($number, $decimals, $lang_common['lang_decimal_point'], $lang_common['lang_thousands_sep']) : $number; +} + + +// +// Generate a random key of length $len +// +function random_key($len, $readable = false, $hash = false) +{ + if (!function_exists('secure_random_bytes')) + include PUN_ROOT.'include/srand.php'; + + $key = secure_random_bytes($len); + + if ($hash) + return substr(bin2hex($key), 0, $len); + else if ($readable) + { + $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; + + $result = ''; + for ($i = 0; $i < $len; ++$i) + $result .= substr($chars, (ord($key[$i]) % strlen($chars)), 1); + + return $result; + } + + return $key; +} + + +// +// Make sure that HTTP_REFERER matches base_url/script +// +function confirm_referrer($scripts, $error_msg = false) +{ + global $lang_common; + + if (!is_array($scripts)) + $scripts = array($scripts); + + // There is no referrer + if (empty($_SERVER['HTTP_REFERER'])) + message($error_msg ? $error_msg : $lang_common['Bad referrer']); + + $referrer = parse_url(strtolower($_SERVER['HTTP_REFERER'])); + // Remove www subdomain if it exists + if (strpos($referrer['host'], 'www.') === 0) + $referrer['host'] = substr($referrer['host'], 4); + + $valid_paths = array(); + foreach ($scripts as $script) + { + $valid = parse_url(strtolower(get_base_url().'/'.$script)); + // Remove www subdomain if it exists + if (strpos($valid['host'], 'www.') === 0) + $valid['host'] = substr($valid['host'], 4); + + $valid_host = $valid['host']; + $valid_paths[] = $valid['path']; + } + + // Check the host and path match. Ignore the scheme, port, etc. + if ($referrer['host'] != $valid_host || !in_array($referrer['path'], $valid_paths, true)) + message($error_msg ? $error_msg : $lang_common['Bad referrer']); +} + + +// +// Validate the given redirect URL, use the fallback otherwise +// +function validate_redirect($redirect_url, $fallback_url) +{ + $referrer = parse_url(strtolower($redirect_url)); + + // Make sure the host component exists + if (!isset($referrer['host'])) + $referrer['host'] = ''; + + // Remove www subdomain if it exists + if (strpos($referrer['host'], 'www.') === 0) + $referrer['host'] = substr($referrer['host'], 4); + + // Make sure the path component exists + if (!isset($referrer['path'])) + $referrer['path'] = ''; + + $valid = parse_url(strtolower(get_base_url())); + + // Remove www subdomain if it exists + if (strpos($valid['host'], 'www.') === 0) + $valid['host'] = substr($valid['host'], 4); + + // Make sure the path component exists + if (!isset($valid['path'])) + $valid['path'] = ''; + + if ($referrer['host'] == $valid['host'] && preg_match('%^'.preg_quote($valid['path'], '%').'/(.*?)\.php%i', $referrer['path'])) + return $redirect_url; + else + return $fallback_url; +} + + +// +// Generate a random password of length $len +// Compatibility wrapper for random_key +// +function random_pass($len) +{ + return random_key($len, true); +} + + +// +// Compute a hash of $str +// +function pun_hash($str) +{ + return sha1($str); +} + + +// +// Compare two strings in constant time +// Inspired by WordPress +// +function pun_hash_equals($a, $b) +{ + if (function_exists('hash_equals')) + return hash_equals((string) $a, (string) $b); + + $a_length = strlen($a); + + if ($a_length !== strlen($b)) + return false; + + $result = 0; + + // Do not attempt to "optimize" this. + for ($i = 0; $i < $a_length; $i++) + $result |= ord($a[$i]) ^ ord($b[$i]); + + return $result === 0; +} + + +// +// Compute a random hash used against CSRF attacks +// +function pun_csrf_token() +{ + global $pun_user; + static $token; + + if (!isset($token)) + $token = pun_hash($pun_user['id'].$pun_user['password'].pun_hash(get_remote_address())); + + return $token; +} + +// +// Check if the CSRF hash is correct +// +function check_csrf($token) +{ + global $lang_common; + + $is_hash_authorized = pun_hash_equals($token, pun_csrf_token()); + + if (!isset($token) || !$is_hash_authorized) + message($lang_common['Bad csrf hash'], false, '404 Not Found'); +} + + +// +// Try to determine the correct remote IP-address +// +function get_remote_address() +{ + $remote_addr = $_SERVER['REMOTE_ADDR']; + + // If we are behind a reverse proxy try to find the real users IP + if (defined('FORUM_BEHIND_REVERSE_PROXY')) + { + if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) + { + // The general format of the field is: + // X-Forwarded-For: client1, proxy1, proxy2 + // where the value is a comma+space separated list of IP addresses, the left-most being the farthest downstream client, + // and each successive proxy that passed the request adding the IP address where it received the request from. + $forwarded_for = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); + $forwarded_for = trim($forwarded_for[0]); + + if (@preg_match('%^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$%', $forwarded_for) || @preg_match('%^((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}:[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){5}:([0-9A-Fa-f]{1,4}:)?[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){4}:([0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){3}:([0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){2}:([0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){6}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(([0-9A-Fa-f]{1,4}:){0,5}:((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|(::([0-9A-Fa-f]{1,4}:){0,5}((\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b)\.){3}(\b((25[0-5])|(1\d{2})|(2[0-4]\d)|(\d{1,2}))\b))|([0-9A-Fa-f]{1,4}::([0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})|(::([0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})|(([0-9A-Fa-f]{1,4}:){1,7}:))$%', $forwarded_for)) + $remote_addr = $forwarded_for; + } + } + + return $remote_addr; +} + + +// +// Calls htmlspecialchars with a few options already set +// +function pun_htmlspecialchars($str) +{ + return htmlspecialchars($str, ENT_QUOTES, 'UTF-8'); +} + + +// +// Calls htmlspecialchars_decode with a few options already set +// +function pun_htmlspecialchars_decode($str) +{ + if (function_exists('htmlspecialchars_decode')) + return htmlspecialchars_decode($str, ENT_QUOTES); + + static $translations; + if (!isset($translations)) + { + $translations = get_html_translation_table(HTML_SPECIALCHARS, ENT_QUOTES); + $translations['''] = '\''; // get_html_translation_table doesn't include ' which is what htmlspecialchars translates ' to, but apparently that is okay?! http://bugs.php.net/bug.php?id=25927 + $translations = array_flip($translations); + } + + return strtr($str, $translations); +} + + +// +// A wrapper for utf8_strlen for compatibility +// +function pun_strlen($str) +{ + return utf8_strlen($str); +} + + +// +// Convert \r\n and \r to \n +// +function pun_linebreaks($str) +{ + return str_replace(array("\r\n", "\r"), "\n", $str); +} + + +// +// A wrapper for utf8_trim for compatibility +// +function pun_trim($str, $charlist = false) +{ + return is_string($str) ? utf8_trim($str, $charlist) : ''; +} + +// +// Checks if a string is in all uppercase +// +function is_all_uppercase($string) +{ + return utf8_strtoupper($string) == $string && utf8_strtolower($string) != $string; +} + + +// +// Inserts $element into $input at $offset +// $offset can be either a numerical offset to insert at (eg: 0 inserts at the beginning of the array) +// or a string, which is the key that the new element should be inserted before +// $key is optional: it's used when inserting a new key/value pair into an associative array +// +function array_insert(&$input, $offset, $element, $key = null) +{ + if (is_null($key)) + $key = $offset; + + // Determine the proper offset if we're using a string + if (!is_int($offset)) + $offset = array_search($offset, array_keys($input), true); + + // Out of bounds checks + if ($offset > count($input)) + $offset = count($input); + else if ($offset < 0) + $offset = 0; + + $input = array_merge(array_slice($input, 0, $offset), array($key => $element), array_slice($input, $offset)); +} + + +// +// Display a message when board is in maintenance mode +// +function maintenance_message() +{ + global $db, $pun_config, $lang_common, $pun_user; + + header('HTTP/1.1 503 Service Unavailable'); + + // Send no-cache headers + header('Expires: Thu, 21 Jul 1977 07:30:00 GMT'); // When yours truly first set eyes on this world! :) + header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT'); + header('Cache-Control: post-check=0, pre-check=0', false); + header('Pragma: no-cache'); // For HTTP/1.0 compatibility + + // Send the Content-type header in case the web server is setup to send something else + header('Content-type: text/html; charset=utf-8'); + + // Deal with newlines, tabs and multiple spaces + $pattern = array("\t", ' ', ' '); + $replace = array('    ', '  ', '  '); + $message = str_replace($pattern, $replace, $pun_config['o_maintenance_message']); + + if (file_exists(PUN_ROOT.'style/'.$pun_user['style'].'/maintenance.tpl')) + { + $tpl_file = PUN_ROOT.'style/'.$pun_user['style'].'/maintenance.tpl'; + $tpl_inc_dir = PUN_ROOT.'style/'.$pun_user['style'].'/'; + } + else + { + $tpl_file = PUN_ROOT.'include/template/maintenance.tpl'; + $tpl_inc_dir = PUN_ROOT.'include/user/'; + } + + $tpl_maint = file_get_contents($tpl_file); + + // START SUBST - <pun_include "*"> + preg_match_all('%<pun_include "([^/\\\\]*?)\.(php[45]?|inc|html?|txt)">%i', $tpl_maint, $pun_includes, PREG_SET_ORDER); + + foreach ($pun_includes as $cur_include) + { + ob_start(); + + // Allow for overriding user includes, too. + if (file_exists($tpl_inc_dir.$cur_include[1].'.'.$cur_include[2])) + require $tpl_inc_dir.$cur_include[1].'.'.$cur_include[2]; + else if (file_exists(PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2])) + require PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2]; + else + error(sprintf($lang_common['Pun include error'], htmlspecialchars($cur_include[0]), basename($tpl_file))); + + $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_language> + $tpl_maint = str_replace('<pun_language>', $lang_common['lang_identifier'], $tpl_maint); + // END SUBST - <pun_language> + + + // 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_head> + ob_start(); + + $page_title = array(pun_htmlspecialchars($pun_config['o_board_title']), $lang_common['Maintenance']); + +?> +<title><?php echo generate_page_title($page_title) ?></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_main> + ob_start(); + +?> +<div class="block"> + <h2><?php echo $lang_common['Maintenance'] ?></h2> + <div class="box"> + <div class="inbox"> + <p><?php echo $message ?></p> + </div> + </div> +</div> +<?php + + $tpl_temp = trim(ob_get_contents()); + $tpl_maint = str_replace('<pun_maint_main>', $tpl_temp, $tpl_maint); + ob_end_clean(); + // END SUBST - <pun_maint_main> + + + // 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, $pun_user; + + // Prefix with base_url (unless there's already a valid URI) + if (strpos($destination_url, 'http://') !== 0 && strpos($destination_url, 'https://') !== 0 && strpos($destination_url, '/') !== 0) + $destination_url = get_base_url(true).'/'.$destination_url; + + // Do a little spring cleaning + $destination_url = preg_replace('%([\r\n])|(\%0[ad])|(;\s*data\s*:)%i', '', $destination_url); + + // If the delay is 0 seconds, we might as well skip the redirect all together + if ($pun_config['o_redirect_delay'] == '0') + { + $db->end_transaction(); + $db->close(); + + header('Location: '.str_replace('&', '&', $destination_url)); + exit; + } + + // Send no-cache headers + header('Expires: Thu, 21 Jul 1977 07:30:00 GMT'); // When yours truly first set eyes on this world! :) + header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT'); + header('Cache-Control: post-check=0, pre-check=0', false); + header('Pragma: no-cache'); // For HTTP/1.0 compatibility + + // Send the Content-type header in case the web server is setup to send something else + header('Content-type: text/html; charset=utf-8'); + + if (file_exists(PUN_ROOT.'style/'.$pun_user['style'].'/redirect.tpl')) + { + $tpl_file = PUN_ROOT.'style/'.$pun_user['style'].'/redirect.tpl'; + $tpl_inc_dir = PUN_ROOT.'style/'.$pun_user['style'].'/'; + } + else + { + $tpl_file = PUN_ROOT.'include/template/redirect.tpl'; + $tpl_inc_dir = PUN_ROOT.'include/user/'; + } + + $tpl_redir = file_get_contents($tpl_file); + + // START SUBST - <pun_include "*"> + preg_match_all('%<pun_include "([^/\\\\]*?)\.(php[45]?|inc|html?|txt)">%i', $tpl_redir, $pun_includes, PREG_SET_ORDER); + + foreach ($pun_includes as $cur_include) + { + ob_start(); + + // Allow for overriding user includes, too. + if (file_exists($tpl_inc_dir.$cur_include[1].'.'.$cur_include[2])) + require $tpl_inc_dir.$cur_include[1].'.'.$cur_include[2]; + else if (file_exists(PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2])) + require PUN_ROOT.'include/user/'.$cur_include[1].'.'.$cur_include[2]; + else + error(sprintf($lang_common['Pun include error'], htmlspecialchars($cur_include[0]), basename($tpl_file))); + + $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_language> + $tpl_redir = str_replace('<pun_language>', $lang_common['lang_identifier'], $tpl_redir); + // END SUBST - <pun_language> + + + // 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_head> + ob_start(); + + $page_title = array(pun_htmlspecialchars($pun_config['o_board_title']), $lang_common['Redirecting']); + +?> +<meta http-equiv="refresh" content="<?php echo $pun_config['o_redirect_delay'] ?>;URL=<?php echo $destination_url ?>" /> +<title><?php echo generate_page_title($page_title) ?></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_main> + ob_start(); + +?> +<div class="block"> + <h2><?php echo $lang_common['Redirecting'] ?></h2> + <div class="box"> + <div class="inbox"> + <p><?php echo $message.'<br /><br /><a href="'.$destination_url.'">'.$lang_common['Click redirect'].'</a>' ?></p> + </div> + </div> +</div> +<?php + + $tpl_temp = trim(ob_get_contents()); + $tpl_redir = str_replace('<pun_redir_main>', $tpl_temp, $tpl_redir); + ob_end_clean(); + // END SUBST - <pun_redir_main> + + + // 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 = null, $line = null, $db_error = false) +{ + global $pun_config, $lang_common; + + // Set some default settings if the script failed before $pun_config could be populated + if (empty($pun_config)) + { + $pun_config = array( + 'o_board_title' => 'FluxBB', + 'o_gzip' => '0' + ); + } + + // Set some default translations if the script failed before $lang_common could be populated + if (empty($lang_common)) + { + $lang_common = array( + 'Title separator' => ' / ', + 'Page' => 'Page %s' + ); + } + + // Empty all output buffers and stop buffering + while (@ob_end_clean()); + + // "Restart" output buffering if we are using ob_gzhandler (since the gzip header is already sent) + if ($pun_config['o_gzip'] && extension_loaded('zlib')) + ob_start('ob_gzhandler'); + + header('HTTP/1.1 500 Internal Server Error'); + + // Send no-cache headers + header('Expires: Thu, 21 Jul 1977 07:30:00 GMT'); // When yours truly first set eyes on this world! :) + header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT'); + header('Cache-Control: post-check=0, pre-check=0', false); + header('Pragma: no-cache'); // For HTTP/1.0 compatibility + + // Send the Content-type header in case the web server is setup to send something else + header('Content-type: text/html; charset=utf-8'); + +?> +<!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=utf-8" /> +<?php $page_title = array(pun_htmlspecialchars($pun_config['o_board_title']), 'Error') ?> +<title><?php echo generate_page_title($page_title) ?></title> +<style type="text/css"> +<!-- +BODY {MARGIN: 10% 20% auto 20%; font: 10px Verdana, Arial, Helvetica, sans-serif} +#errorbox {BORDER: 1px solid #B84623} +H2 {MARGIN: 0; COLOR: #FFFFFF; BACKGROUND-COLOR: #B84623; FONT-SIZE: 1.1em; PADDING: 5px 4px} +#errorbox DIV {PADDING: 6px 5px; BACKGROUND-COLOR: #F1F1F1} +--> +</style> +</head> +<body> + +<div id="errorbox"> + <h2>An error was encountered</h2> + <div> +<?php + + if (defined('PUN_DEBUG') && !is_null($file) && !is_null($line)) + { + $file = str_replace(realpath(PUN_ROOT), '', $file); + + echo "\t\t".'<strong>File:</strong> '.$file.'<br />'."\n\t\t".'<strong>Line:</strong> '.$line.'<br /><br />'."\n\t\t".'<strong>FluxBB reported</strong>: '.$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>'.pun_htmlspecialchars($message).'.</strong>'."\n"; + +?> + </div> +</div> + +</body> +</html> +<?php + + // If a database connection was established (before this error) we close it + if ($db_error) + $GLOBALS['db']->close(); + + exit; +} + + +// +// Unset any variables instantiated as a result of register_globals being enabled +// +function forum_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 + } + } +} + + +// +// Removes any "bad" characters (characters which mess with the display of a page, are invisible, etc) from user input +// +function forum_remove_bad_characters() +{ + $_GET = remove_bad_characters($_GET); + $_POST = remove_bad_characters($_POST); + $_COOKIE = remove_bad_characters($_COOKIE); + $_REQUEST = remove_bad_characters($_REQUEST); +} + +// +// Removes any "bad" characters (characters which mess with the display of a page, are invisible, etc) from the given string +// See: http://kb.mozillazine.org/Network.IDN.blacklist_chars +// +function remove_bad_characters($array) +{ + static $bad_utf8_chars; + + if (!isset($bad_utf8_chars)) + { + $bad_utf8_chars = array( + "\xcc\xb7" => '', // COMBINING SHORT SOLIDUS OVERLAY 0337 * + "\xcc\xb8" => '', // COMBINING LONG SOLIDUS OVERLAY 0338 * + "\xe1\x85\x9F" => '', // HANGUL CHOSEONG FILLER 115F * + "\xe1\x85\xA0" => '', // HANGUL JUNGSEONG FILLER 1160 * + "\xe2\x80\x8b" => '', // ZERO WIDTH SPACE 200B * + "\xe2\x80\x8c" => '', // ZERO WIDTH NON-JOINER 200C + "\xe2\x80\x8d" => '', // ZERO WIDTH JOINER 200D + "\xe2\x80\x8e" => '', // LEFT-TO-RIGHT MARK 200E + "\xe2\x80\x8f" => '', // RIGHT-TO-LEFT MARK 200F + "\xe2\x80\xaa" => '', // LEFT-TO-RIGHT EMBEDDING 202A + "\xe2\x80\xab" => '', // RIGHT-TO-LEFT EMBEDDING 202B + "\xe2\x80\xac" => '', // POP DIRECTIONAL FORMATTING 202C + "\xe2\x80\xad" => '', // LEFT-TO-RIGHT OVERRIDE 202D + "\xe2\x80\xae" => '', // RIGHT-TO-LEFT OVERRIDE 202E + "\xe2\x80\xaf" => '', // NARROW NO-BREAK SPACE 202F * + "\xe2\x81\x9f" => '', // MEDIUM MATHEMATICAL SPACE 205F * + "\xe2\x81\xa0" => '', // WORD JOINER 2060 + "\xe3\x85\xa4" => '', // HANGUL FILLER 3164 * + "\xef\xbb\xbf" => '', // ZERO WIDTH NO-BREAK SPACE FEFF + "\xef\xbe\xa0" => '', // HALFWIDTH HANGUL FILLER FFA0 * + "\xef\xbf\xb9" => '', // INTERLINEAR ANNOTATION ANCHOR FFF9 * + "\xef\xbf\xba" => '', // INTERLINEAR ANNOTATION SEPARATOR FFFA * + "\xef\xbf\xbb" => '', // INTERLINEAR ANNOTATION TERMINATOR FFFB * + "\xef\xbf\xbc" => '', // OBJECT REPLACEMENT CHARACTER FFFC * + "\xef\xbf\xbd" => '', // REPLACEMENT CHARACTER FFFD * + "\xe2\x80\x80" => ' ', // EN QUAD 2000 * + "\xe2\x80\x81" => ' ', // EM QUAD 2001 * + "\xe2\x80\x82" => ' ', // EN SPACE 2002 * + "\xe2\x80\x83" => ' ', // EM SPACE 2003 * + "\xe2\x80\x84" => ' ', // THREE-PER-EM SPACE 2004 * + "\xe2\x80\x85" => ' ', // FOUR-PER-EM SPACE 2005 * + "\xe2\x80\x86" => ' ', // SIX-PER-EM SPACE 2006 * + "\xe2\x80\x87" => ' ', // FIGURE SPACE 2007 * + "\xe2\x80\x88" => ' ', // PUNCTUATION SPACE 2008 * + "\xe2\x80\x89" => ' ', // THIN SPACE 2009 * + "\xe2\x80\x8a" => ' ', // HAIR SPACE 200A * + "\xE3\x80\x80" => ' ', // IDEOGRAPHIC SPACE 3000 * + ); + } + + if (is_array($array)) + return array_map('remove_bad_characters', $array); + + // Strip out any invalid characters + $array = utf8_bad_strip($array); + + // Remove control characters + $array = preg_replace('%[\x00-\x08\x0b-\x0c\x0e-\x1f]%', '', $array); + + // Replace some "bad" characters + $array = str_replace(array_keys($bad_utf8_chars), array_values($bad_utf8_chars), $array); + + return $array; +} + + +// +// Converts the file size in bytes to a human readable file size +// +function file_size($size) +{ + global $lang_common; + + $units = array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB'); + + for ($i = 0; $size > 1024; $i++) + $size /= 1024; + + return sprintf($lang_common['Size unit '.$units[$i]], round($size, 2)); +} + + +// +// Fetch a list of available styles +// +function forum_list_styles() +{ + $styles = array(); + + $d = dir(PUN_ROOT.'style'); + while (($entry = $d->read()) !== false) + { + if ($entry{0} == '.') + continue; + + if (substr($entry, -4) == '.css') + $styles[] = substr($entry, 0, -4); + } + $d->close(); + + natcasesort($styles); + + return $styles; +} + + +// +// Fetch a list of available language packs +// +function forum_list_langs() +{ + $languages = array(); + + $d = dir(PUN_ROOT.'lang'); + while (($entry = $d->read()) !== false) + { + if ($entry{0} == '.') + continue; + + if (is_dir(PUN_ROOT.'lang/'.$entry) && file_exists(PUN_ROOT.'lang/'.$entry.'/common.php')) + $languages[] = $entry; + } + $d->close(); + + natcasesort($languages); + + return $languages; +} + + +// +// Generate a cache ID based on the last modification time for all stopwords files +// +function generate_stopwords_cache_id() +{ + $files = glob(PUN_ROOT.'lang/*/stopwords.txt'); + if ($files === false) + return 'cache_id_error'; + + $hash = array(); + + foreach ($files as $file) + { + $hash[] = $file; + $hash[] = filemtime($file); + } + + return sha1(implode('|', $hash)); +} + + +// +// Split text into chunks ($inside contains all text inside $start and $end, and $outside contains all text outside) +// +function split_text($text, $start, $end, $retab = true) +{ + global $pun_config; + + $result = array(0 => array(), 1 => array()); // 0 = inside, 1 = outside + + // split the text into parts + $parts = preg_split('%'.preg_quote($start, '%').'(.*)'.preg_quote($end, '%').'%Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE); + $num_parts = count($parts); + + // preg_split results in outside parts having even indices, inside parts having odd + for ($i = 0;$i < $num_parts;$i++) + $result[1 - ($i % 2)][] = $parts[$i]; + + if ($pun_config['o_indent_num_spaces'] != 8 && $retab) + { + $spaces = str_repeat(' ', $pun_config['o_indent_num_spaces']); + $result[1] = str_replace("\t", $spaces, $result[1]); + } + + return $result; +} + + +// +// Extract blocks from a text with a starting and ending string +// This function always matches the most outer block so nesting is possible +// +function extract_blocks($text, $start, $end, $retab = true) +{ + global $pun_config; + + $code = array(); + $start_len = strlen($start); + $end_len = strlen($end); + $regex = '%(?:'.preg_quote($start, '%').'|'.preg_quote($end, '%').')%'; + $matches = array(); + + if (preg_match_all($regex, $text, $matches)) + { + $counter = $offset = 0; + $start_pos = $end_pos = false; + + foreach ($matches[0] as $match) + { + if ($match == $start) + { + if ($counter == 0) + $start_pos = strpos($text, $start); + $counter++; + } + elseif ($match == $end) + { + $counter--; + if ($counter == 0) + $end_pos = strpos($text, $end, $offset + 1); + $offset = strpos($text, $end, $offset + 1); + } + + if ($start_pos !== false && $end_pos !== false) + { + $code[] = substr($text, $start_pos + $start_len, + $end_pos - $start_pos - $start_len); + $text = substr_replace($text, "\1", $start_pos, + $end_pos - $start_pos + $end_len); + $start_pos = $end_pos = false; + $offset = 0; + } + } + } + + if ($pun_config['o_indent_num_spaces'] != 8 && $retab) + { + $spaces = str_repeat(' ', $pun_config['o_indent_num_spaces']); + $text = str_replace("\t", $spaces, $text); + } + + return array($code, $text); +} + + +// +// function url_valid($url) { +// +// Return associative array of valid URI components, or FALSE if $url is not +// RFC-3986 compliant. If the passed URL begins with: "www." or "ftp.", then +// "http://" or "ftp://" is prepended and the corrected full-url is stored in +// the return array with a key name "url". This value should be used by the caller. +// +// Return value: FALSE if $url is not valid, otherwise array of URI components: +// e.g. +// Given: "http://www.jmrware.com:80/articles?height=10&width=75#fragone" +// Array( +// [scheme] => http +// [authority] => www.jmrware.com:80 +// [userinfo] => +// [host] => www.jmrware.com +// [IP_literal] => +// [IPV6address] => +// [ls32] => +// [IPvFuture] => +// [IPv4address] => +// [regname] => www.jmrware.com +// [port] => 80 +// [path_abempty] => /articles +// [query] => height=10&width=75 +// [fragment] => fragone +// [url] => http://www.jmrware.com:80/articles?height=10&width=75#fragone +// ) +function url_valid($url) +{ + if (strpos($url, 'www.') === 0) $url = 'http://'. $url; + if (strpos($url, 'ftp.') === 0) $url = 'ftp://'. $url; + if (!preg_match('/# Valid absolute URI having a non-empty, valid DNS host. + ^ + (?P<scheme>[A-Za-z][A-Za-z0-9+\-.]*):\/\/ + (?P<authority> + (?:(?P<userinfo>(?:[A-Za-z0-9\-._~!$&\'()*+,;=:]|%[0-9A-Fa-f]{2})*)@)? + (?P<host> + (?P<IP_literal> + \[ + (?: + (?P<IPV6address> + (?: (?:[0-9A-Fa-f]{1,4}:){6} + | ::(?:[0-9A-Fa-f]{1,4}:){5} + | (?: [0-9A-Fa-f]{1,4})?::(?:[0-9A-Fa-f]{1,4}:){4} + | (?:(?:[0-9A-Fa-f]{1,4}:){0,1}[0-9A-Fa-f]{1,4})?::(?:[0-9A-Fa-f]{1,4}:){3} + | (?:(?:[0-9A-Fa-f]{1,4}:){0,2}[0-9A-Fa-f]{1,4})?::(?:[0-9A-Fa-f]{1,4}:){2} + | (?:(?:[0-9A-Fa-f]{1,4}:){0,3}[0-9A-Fa-f]{1,4})?:: [0-9A-Fa-f]{1,4}: + | (?:(?:[0-9A-Fa-f]{1,4}:){0,4}[0-9A-Fa-f]{1,4})?:: + ) + (?P<ls32>[0-9A-Fa-f]{1,4}:[0-9A-Fa-f]{1,4} + | (?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3} + (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?) + ) + | (?:(?:[0-9A-Fa-f]{1,4}:){0,5}[0-9A-Fa-f]{1,4})?:: [0-9A-Fa-f]{1,4} + | (?:(?:[0-9A-Fa-f]{1,4}:){0,6}[0-9A-Fa-f]{1,4})?:: + ) + | (?P<IPvFuture>[Vv][0-9A-Fa-f]+\.[A-Za-z0-9\-._~!$&\'()*+,;=:]+) + ) + \] + ) + | (?P<IPv4address>(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3} + (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)) + | (?P<regname>(?:[A-Za-z0-9\-._~!$&\'()*+,;=]|%[0-9A-Fa-f]{2})+) + ) + (?::(?P<port>[0-9]*))? + ) + (?P<path_abempty>(?:\/(?:[A-Za-z0-9\-._~!$&\'()*+,;=:@]|%[0-9A-Fa-f]{2})*)*) + (?:\?(?P<query> (?:[A-Za-z0-9\-._~!$&\'()*+,;=:@\\/?]|%[0-9A-Fa-f]{2})*))? + (?:\#(?P<fragment> (?:[A-Za-z0-9\-._~!$&\'()*+,;=:@\\/?]|%[0-9A-Fa-f]{2})*))? + $ + /mx', $url, $m)) return FALSE; + switch ($m['scheme']) + { + case 'https': + case 'http': + if ($m['userinfo']) return FALSE; // HTTP scheme does not allow userinfo. + break; + case 'ftps': + case 'ftp': + break; + default: + return FALSE; // Unrecognised URI scheme. Default to FALSE. + } + // Validate host name conforms to DNS "dot-separated-parts". + if ($m{'regname'}) // If host regname specified, check for DNS conformance. + { + if (!preg_match('/# HTTP DNS host name. + ^ # Anchor to beginning of string. + (?!.{256}) # Overall host length is less than 256 chars. + (?: # Group dot separated host part alternatives. + [0-9A-Za-z]\. # Either a single alphanum followed by dot + | # or... part has more than one char (63 chars max). + [0-9A-Za-z] # Part first char is alphanum (no dash). + [\-0-9A-Za-z]{0,61} # Internal chars are alphanum plus dash. + [0-9A-Za-z] # Part last char is alphanum (no dash). + \. # Each part followed by literal dot. + )* # One or more parts before top level domain. + (?: # Top level domains + [A-Za-z]{2,63}| # Country codes are exactly two alpha chars. + xn--[0-9A-Za-z]{4,59}) # Internationalized Domain Name (IDN) + $ # Anchor to end of string. + /ix', $m['host'])) return FALSE; + } + $m['url'] = $url; + for ($i = 0; isset($m[$i]); ++$i) unset($m[$i]); + return $m; // return TRUE == array of useful named $matches plus the valid $url. +} + +// +// Replace string matching regular expression +// +// This function takes care of possibly disabled unicode properties in PCRE builds +// +function ucp_preg_replace($pattern, $replace, $subject, $callback = false) +{ + if($callback) + $replaced = preg_replace_callback($pattern, create_function('$matches', 'return '.$replace.';'), $subject); + else + $replaced = preg_replace($pattern, $replace, $subject); + + // If preg_replace() returns false, this probably means unicode support is not built-in, so we need to modify the pattern a little + if ($replaced === false) + { + if (is_array($pattern)) + { + foreach ($pattern as $cur_key => $cur_pattern) + $pattern[$cur_key] = str_replace('\p{L}\p{N}', '\w', $cur_pattern); + + $replaced = preg_replace($pattern, $replace, $subject); + } + else + $replaced = preg_replace(str_replace('\p{L}\p{N}', '\w', $pattern), $replace, $subject); + } + + return $replaced; +} + +// +// A wrapper for ucp_preg_replace +// +function ucp_preg_replace_callback($pattern, $replace, $subject) +{ + return ucp_preg_replace($pattern, $replace, $subject, true); +} + +// +// Replace four-byte characters with a question mark +// +// As MySQL cannot properly handle four-byte characters with the default utf-8 +// charset up until version 5.5.3 (where a special charset has to be used), they +// need to be replaced, by question marks in this case. +// +function strip_bad_multibyte_chars($str) +{ + $result = ''; + $length = strlen($str); + + for ($i = 0; $i < $length; $i++) + { + // Replace four-byte characters (11110www 10zzzzzz 10yyyyyy 10xxxxxx) + $ord = ord($str[$i]); + if ($ord >= 240 && $ord <= 244) + { + $result .= '?'; + $i += 3; + } + else + { + $result .= $str[$i]; + } + } + + return $result; +} + +// +// Check whether a file/folder is writable. +// +// This function also works on Windows Server where ACLs seem to be ignored. +// +function forum_is_writable($path) +{ + if (is_dir($path)) + { + $path = rtrim($path, '/').'/'; + return forum_is_writable($path.uniqid(mt_rand()).'.tmp'); + } + + // Check temporary file for read/write capabilities + $rm = file_exists($path); + $f = @fopen($path, 'a'); + + if ($f === false) + return false; + + fclose($f); + + if (!$rm) + @unlink($path); + + return true; +} + + +// 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> + <thead> + <tr> + <th class="tcl" scope="col"><?php echo $lang_common['Query times'] ?></th> + <th class="tcr" scope="col"><?php echo $lang_common['Query'] ?></th> + </tr> + </thead> + <tbody> +<?php + + $query_time_total = 0.0; + foreach ($saved_queries as $cur_query) + { + $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"><?php printf($lang_common['Total query time'], $query_time_total.' s') ?></td> + </tr> + </tbody> + </table> + </div> + </div> +</div> +<?php + +} + + +// +// 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; +} |