PC World 2005 April/PCWorld_2005-04_cd.bin/akce/web/phpnuke/PHP-Nuke-7.5.exe/html/includes/functions.php

PHP Script | 2004-07-18 | 25.1 KB | 852 lines

<?php
/***************************************************************************
 *                               functions.php
 *                            -------------------
 *   begin                : Saturday, Feb 13, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : [e-mail]
 *
 *   $Id: functions.php,v 1.133.2.32 2004/07/17 13:48:31 acydburn Exp $
 *
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program 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.
 *
 *
 ***************************************************************************/
if ( !defined('IN_PHPBB') )
{
        die("Hacking attempt");
        exit;
}

function get_db_stat($mode)
{
    global $db;

    switch( $mode )
    {
        case 'usercount':
            $sql = "SELECT COUNT(user_id) AS total
                FROM " . USERS_TABLE . "
                WHERE user_id <> " . ANONYMOUS;
            break;

        case 'newestuser':
            $sql = "SELECT user_id, username
                FROM " . USERS_TABLE . "
                WHERE user_id <> " . ANONYMOUS . "
                ORDER BY user_id DESC
                LIMIT 1";
            break;

        case 'postcount':
        case 'topiccount':
            $sql = "SELECT SUM(forum_topics) AS topic_total, SUM(forum_posts) AS post_total
                FROM " . FORUMS_TABLE;
            break;
    }

    if ( !($result = $db->sql_query($sql)) )
    {
        return false;
    }

    $row = $db->sql_fetchrow($result);

    switch ( $mode )
    {
        case 'usercount':
            return $row['total'];
            break;
        case 'newestuser':
            return $row;
            break;
        case 'postcount':
            return $row['post_total'];
            break;
        case 'topiccount':
            return $row['topic_total'];
            break;
    }

    return false;
}

//
// Get Userdata, $user can be username or user_id. If force_str is true, the username will be forced.
//
function get_userdata($user, $force_str = false)
{
    global $db;

    if (intval($user) == 0 || $force_str)
    {
        $user = trim(htmlspecialchars($user));
        $user = substr(str_replace("\\'", "'", $user), 0, 25);
        $user = str_replace("'", "\\'", $user);
    }
    else
    {
        $user = intval($user);
    }

    $sql = "SELECT *
                FROM " . USERS_TABLE . "
        WHERE ";
    $sql .= ( ( is_integer($user) ) ? "user_id = $user" : "username = '" .  $user . "'" ) . " AND user_id <> " . ANONYMOUS;
    if ( !($result = $db->sql_query($sql)) )
    {
        message_die(GENERAL_ERROR, 'Tried obtaining data for a non-existent user', '', __LINE__, __FILE__, $sql);
    }

    return ( $row = $db->sql_fetchrow($result) ) ? $row : false;
}

function make_jumpbox($action, $match_forum_id = 0)
{
    global $template, $userdata, $lang, $db, $nav_links, $phpEx, $SID;

//    $is_auth = auth(AUTH_VIEW, AUTH_LIST_ALL, $userdata);

    $sql = "SELECT c.cat_id, c.cat_title, c.cat_order
        FROM " . CATEGORIES_TABLE . " c, " . FORUMS_TABLE . " f
        WHERE f.cat_id = c.cat_id
        GROUP BY c.cat_id, c.cat_title, c.cat_order
        ORDER BY c.cat_order";
    if ( !($result = $db->sql_query($sql)) )
    {
        message_die(GENERAL_ERROR, "Couldn't obtain category list.", "", __LINE__, __FILE__, $sql);
    }

    $category_rows = array();
    while ( $row = $db->sql_fetchrow($result) )
    {
        $category_rows[] = $row;
    }

    if ( $total_categories = count($category_rows) )
    {
        $sql = "SELECT *
            FROM " . FORUMS_TABLE . "
            ORDER BY cat_id, forum_order";
        if ( !($result = $db->sql_query($sql)) )
        {
            message_die(GENERAL_ERROR, 'Could not obtain forums information', '', __LINE__, __FILE__, $sql);
        }

        $boxstring = '<select name="' . POST_FORUM_URL . '" onchange="if(this.options[this.selectedIndex].value != -1){ forms[\'jumpbox\'].submit() }"><option value="-1">' . $lang['Select_forum'] . '</option>';

        $forum_rows = array();
        while ( $row = $db->sql_fetchrow($result) )
        {
            $forum_rows[] = $row;
        }

        if ( $total_forums = count($forum_rows) )
        {
            for($i = 0; $i < $total_categories; $i++)
            {
                $boxstring_forums = '';
                for($j = 0; $j < $total_forums; $j++)
                {
                    if ( $forum_rows[$j]['cat_id'] == $category_rows[$i]['cat_id'] && $forum_rows[$j]['auth_view'] <= AUTH_REG )
                    {

//                    if ( $forum_rows[$j]['cat_id'] == $category_rows[$i]['cat_id'] && $is_auth[$forum_rows[$j]['forum_id']]['auth_view'] )
//                    {
                        $selected = ( $forum_rows[$j]['forum_id'] == $match_forum_id ) ? 'selected="selected"' : '';
                        $boxstring_forums .=  '<option value="' . $forum_rows[$j]['forum_id'] . '"' . $selected . '>' . $forum_rows[$j]['forum_name'] . '</option>';

                        //
                        // Add an array to $nav_links for the Mozilla navigation bar.
                        // 'chapter' and 'forum' can create multiple items, therefore we are using a nested array.
                        //
                        $nav_links['chapter forum'][$forum_rows[$j]['forum_id']] = array (
                            'url' => append_sid("viewforum.$phpEx?" . POST_FORUM_URL . "=" . $forum_rows[$j]['forum_id']),
                            'title' => $forum_rows[$j]['forum_name']
                        );

                    }
                }

                if ( $boxstring_forums != '' )
                {
                    $boxstring .= '<option value="-1"> </option>';
                    $boxstring .= '<option value="-1">' . $category_rows[$i]['cat_title'] . '</option>';
                    $boxstring .= '<option value="-1">----------------</option>';
                    $boxstring .= $boxstring_forums;
                }
            }
        }

        $boxstring .= '</select>';
    }
    else
    {
        $boxstring .= '<select name="' . POST_FORUM_URL . '" onchange="if(this.options[this.selectedIndex].value != -1){ forms[\'jumpbox\'].submit() }"></select>';
    }

    // Let the jumpbox work again in sites having additional session id checks.
//    if ( !empty($SID) )
//    {
                $boxstring .= '<input type="hidden" name="sid" value="' . $SID . '" />';
//    }

    $template->set_filenames(array(
        'jumpbox' => 'jumpbox.tpl')
    );
    $template->assign_vars(array(
        'L_GO' => $lang['Go'],
        'L_JUMP_TO' => $lang['Jump_to'],
        'L_SELECT_FORUM' => $lang['Select_forum'],

        'S_JUMPBOX_SELECT' => $boxstring,
        'S_JUMPBOX_ACTION' => append_sid($action))
    );
    $template->assign_var_from_handle('JUMPBOX', 'jumpbox');

    return;
}

//
// Initialise user settings on page load
function init_userprefs($userdata)
{
    global $board_config, $theme, $images;
    global $template, $lang, $phpEx, $phpbb_root_path;
    global $nav_links;

    if ( $userdata['user_id'] != ANONYMOUS )
    {
        if ( !empty($userdata['user_lang']))
        {
            $board_config['default_lang'] = $userdata['user_lang'];
        }

        if ( !empty($userdata['user_dateformat']) )
        {
            $board_config['default_dateformat'] = $userdata['user_dateformat'];
        }

        if ( isset($userdata['user_timezone']) )
        {
            $board_config['board_timezone'] = $userdata['user_timezone'];
        }
    }

    if ( !file_exists(@phpbb_realpath($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_main.'.$phpEx)) )
    {
        $board_config['default_lang'] = 'english';
    }

    include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_main.' . $phpEx);

    if ( defined('IN_ADMIN') )
    {
        if( !file_exists(@phpbb_realpath($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_admin.'.$phpEx)) )
        {
            $board_config['default_lang'] = 'english';
        }

        include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_admin.' . $phpEx);
    }

    //
    // Set up style
    //
    if ( !$board_config['override_user_style'] )
    {
        if ( $userdata['user_id'] != ANONYMOUS && $userdata['user_style'] > 0 )
        {
            if ( $theme = setup_style($userdata['user_style']) )
            {
                return;
            }
        }
    }

    $theme = setup_style($board_config['default_style']);

    //
    // Mozilla navigation bar
    // Default items that should be valid on all pages.
    // Defined here to correctly assign the Language Variables
    // and be able to change the variables within code.
    //
        $nav_links['top'] = array (
        'url' => append_sid($phpbb_root_path . 'index.' . $phpEx),
        'title' => sprintf($lang['Forum_Index'], $board_config['sitename'])
    );
        $nav_links['search'] = array (
        'url' => append_sid($phpbb_root_path . 'search.' . $phpEx),
        'title' => $lang['Search']
    );
        $nav_links['help'] = array (
        'url' => append_sid($phpbb_root_path . 'faq.' . $phpEx),
        'title' => $lang['FAQ']
    );
        $nav_links['author'] = array (
        'url' => append_sid($phpbb_root_path . 'memberlist.' . $phpEx),
        'title' => $lang['Memberlist']
    );

    return;
}

function setup_style($style)
{
    global $db, $board_config, $template, $images, $phpbb_root_path;
        if($name == "Forums"){
                cookiedecode($user);
            $info=sql_query("select * from ".$prefix."_bbconfig where config_name='default_style'", $dbi);
            $get_info=mysql_fetch_array($info);
            $default_style=$get_info[config_value];
            if($cookie[1] == "" AND $style != "$default_style") {
                $style = "$default_style";
            }
        }

    $sql = "SELECT *
        FROM " . THEMES_TABLE . "
                WHERE themes_id = '$style'";
    if ( !($result = $db->sql_query($sql)) )
    {
        message_die(CRITICAL_ERROR, 'Could not query database for theme info');
    }

    if ( !($row = $db->sql_fetchrow($result)) )
    {
        message_die(CRITICAL_ERROR, "Could not get theme data for themes_id [$style]");
    }

        $ThemeSel = get_theme();
        if (file_exists("themes/$ThemeSel/forums/index_body.tpl")) {
                $template_path = "themes/$ThemeSel/";
            $template_name = "forums";
            $template = new Template($template_path . $template_name, $board_config, $db);
        } else {
    $template_path = 'templates/' ;
    $template_name = $row['template_name'] ;
            $template = new Template($phpbb_root_path . $template_path . $template_name, $board_config, $db);
        }



    if ( $template )
    {
        $current_template_path = $template_path . $template_name;
                $ThemeSel = get_theme();
                if (file_exists("themes/$ThemeSel/$template_name/index_body.tpl")) {
                    @include($template_path . $template_name . '/' . $template_name . '.cfg');
                } else {
        @include($phpbb_root_path . $template_path . $template_name . '/' . $template_name . '.cfg');
                }
        if ( !defined('TEMPLATE_CONFIG') )
        {
            message_die(CRITICAL_ERROR, "Could not open $template_name template config file", '', __LINE__, __FILE__);
        }

        $img_lang = ( file_exists(@phpbb_realpath($phpbb_root_path . $current_template_path . '/images/lang_' . $board_config['default_lang'])) ) ? $board_config['default_lang'] : 'english';

        while( list($key, $value) = @each($images) )
        {
            if ( !is_array($value) )
            {
                $images[$key] = str_replace('{LANG}', 'lang_' . $img_lang, $value);
            }
        }
    }

    return $row;
}

function encode_ip($dotquad_ip)
{
    $ip_sep = explode('.', $dotquad_ip);
    return sprintf('%02x%02x%02x%02x', $ip_sep[0], $ip_sep[1], $ip_sep[2], $ip_sep[3]);
}

function decode_ip($int_ip)
{
    $hexipbang = explode('.', chunk_split($int_ip, 2, '.'));
    return hexdec($hexipbang[0]). '.' . hexdec($hexipbang[1]) . '.' . hexdec($hexipbang[2]) . '.' . hexdec($hexipbang[3]);
}

//
// Create date/time from format and timezone
//
function create_date($format, $gmepoch, $tz)
{
    global $board_config, $lang;
    static $translate;

    if ( empty($translate) && $board_config['default_lang'] != 'english' )
    {
        @reset($lang['datetime']);
        while ( list($match, $replace) = @each($lang['datetime']) )
        {
            $translate[$match] = $replace;
        }
    }

    return ( !empty($translate) ) ? strtr(@gmdate($format, $gmepoch + (3600 * $tz)), $translate) : @gmdate($format, $gmepoch + (3600 * $tz));
}

//
// Pagination routine, generates
// page number sequence
//
function generate_pagination($base_url, $num_items, $per_page, $start_item, $add_prevnext_text = TRUE)
{
    global $lang;

    $total_pages = ceil($num_items/$per_page);

    if ( $total_pages == 1 )
    {
        return '';
    }

    $on_page = floor($start_item / $per_page) + 1;

    $page_string = '';
    if ( $total_pages > 10 )
    {
        $init_page_max = ( $total_pages > 3 ) ? 3 : $total_pages;

        for($i = 1; $i < $init_page_max + 1; $i++)
        {
            $page_string .= ( $i == $on_page ) ? '<b>' . $i . '</b>' : '<a href="' . append_sid($base_url . "&start=" . ( ( $i - 1 ) * $per_page ) ) . '">' . $i . '</a>';
            if ( $i <  $init_page_max )
            {
                $page_string .= ", ";
            }
        }

        if ( $total_pages > 3 )
        {
            if ( $on_page > 1  && $on_page < $total_pages )
            {
                $page_string .= ( $on_page > 5 ) ? ' ... ' : ', ';

                $init_page_min = ( $on_page > 4 ) ? $on_page : 5;
                $init_page_max = ( $on_page < $total_pages - 4 ) ? $on_page : $total_pages - 4;

                for($i = $init_page_min - 1; $i < $init_page_max + 2; $i++)
                {
                    $page_string .= ($i == $on_page) ? '<b>' . $i . '</b>' : '<a href="' . append_sid($base_url . "&start=" . ( ( $i - 1 ) * $per_page ) ) . '">' . $i . '</a>';
                    if ( $i <  $init_page_max + 1 )
                    {
                        $page_string .= ', ';
                    }
                }

                $page_string .= ( $on_page < $total_pages - 4 ) ? ' ... ' : ', ';
            }
            else
            {
                $page_string .= ' ... ';
            }

            for($i = $total_pages - 2; $i < $total_pages + 1; $i++)
            {
                $page_string .= ( $i == $on_page ) ? '<b>' . $i . '</b>'  : '<a href="' . append_sid($base_url . "&start=" . ( ( $i - 1 ) * $per_page ) ) . '">' . $i . '</a>';
                if( $i <  $total_pages )
                {
                    $page_string .= ", ";
                }
            }
        }
    }
    else
    {
        for($i = 1; $i < $total_pages + 1; $i++)
        {
            $page_string .= ( $i == $on_page ) ? '<b>' . $i . '</b>' : '<a href="' . append_sid($base_url . "&start=" . ( ( $i - 1 ) * $per_page ) ) . '">' . $i . '</a>';
            if ( $i <  $total_pages )
            {
                $page_string .= ', ';
            }
        }
    }

    if ( $add_prevnext_text )
    {
        if ( $on_page > 1 )
        {
            $page_string = ' <a href="' . append_sid($base_url . "&start=" . ( ( $on_page - 2 ) * $per_page ) ) . '">' . $lang['Previous'] . '</a>  ' . $page_string;
        }

        if ( $on_page < $total_pages )
        {
            $page_string .= '  <a href="' . append_sid($base_url . "&start=" . ( $on_page * $per_page ) ) . '">' . $lang['Next'] . '</a>';
        }

    }

    $page_string = $lang['Goto_page'] . ' ' . $page_string;

    return $page_string;
}

//
// This does exactly what preg_quote() does in PHP 4-ish
// If you just need the 1-parameter preg_quote call, then don't bother using this.
//
function phpbb_preg_quote($str, $delimiter)
{
    $text = preg_quote($str);
    $text = str_replace($delimiter, '\\' . $delimiter, $text);

    return $text;
}

//
// Obtain list of naughty words and build preg style replacement arrays for use by the
// calling script, note that the vars are passed as references this just makes it easier
// to return both sets of arrays
//
function obtain_word_list(&$orig_word, &$replacement_word)
{
    global $db;

    //
    // Define censored word matches
    //
    $sql = "SELECT word, replacement
        FROM  " . WORDS_TABLE;
    if( !($result = $db->sql_query($sql)) )
    {
        message_die(GENERAL_ERROR, 'Could not get censored words from database', '', __LINE__, __FILE__, $sql);
    }

    if ( $row = $db->sql_fetchrow($result) )
    {
                do
        {
            $orig_word[] = '#\b(' . str_replace('\*', '\w*?', phpbb_preg_quote($row['word'], '#')) . ')\b#i';
            $replacement_word[] = $row['replacement'];
        }
        while ( $row = $db->sql_fetchrow($result) );
    }

    return true;
}

//
// This is general replacement for die(), allows templated
// output in users (or default) language, etc.
//
// $msg_code can be one of these constants:
//
// GENERAL_MESSAGE : Use for any simple text message, eg. results
// of an operation, authorisation failures, etc.
//
// GENERAL ERROR : Use for any error which occurs _AFTER_ the
// common.php include and session code, ie. most errors in
// pages/functions
//
// CRITICAL_MESSAGE : Used when basic config data is available but
// a session may not exist, eg. banned users
//
// CRITICAL_ERROR : Used when config data cannot be obtained, eg
// no database connection. Should _not_ be used in 99.5% of cases
//
function message_die($msg_code, $msg_text = '', $msg_title = '', $err_line = '', $err_file = '', $sql = '')
{
    global $db, $template, $board_config, $theme, $lang, $phpEx, $phpbb_root_path, $nav_links, $gen_simple_header, $images;
    global $userdata, $user_ip, $session_length;
    global $starttime;

    if(defined('HAS_DIED'))
    {
        die("message_die() was called multiple times. This isn't supposed to happen. Was message_die() used in page_tail.php?");
    }

    define(HAS_DIED, 1);


    $sql_store = $sql;

    //
        // Get SQL error if we are debugging. Do this as soon as possible to prevent
    // subsequent queries from overwriting the status of sql_error()
    //
    if ( DEBUG && ( $msg_code == GENERAL_ERROR || $msg_code == CRITICAL_ERROR ) )
    {
        $sql_error = $db->sql_error();

        $debug_text = '';

        if ( $sql_error['message'] != '' )
        {
            $debug_text .= '<br /><br />SQL Error : ' . $sql_error['code'] . ' ' . $sql_error['message'];
        }

        if ( $sql_store != '' )
        {
            $debug_text .= "<br /><br />$sql_store";
        }

        if ( $err_line != '' && $err_file != '' )
        {
            $debug_text .= '</br /><br />Line : ' . $err_line . '<br />File : ' . $err_file;
        }
    }

    if( empty($userdata) && ( $msg_code == GENERAL_MESSAGE || $msg_code == GENERAL_ERROR ) )
    {
                $userdata = session_pagestart($user_ip, PAGE_INDEX, $nukeuser);
        init_userprefs($userdata);
    }

    //
    // If the header hasn't been output then do it
    //
    if ( !defined('HEADER_INC') && $msg_code != CRITICAL_ERROR )
    {
        if ( empty($lang) )
        {
            if ( !empty($board_config['default_lang']) )
            {
                include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_main.'.$phpEx);
            }
            else
            {
                include($phpbb_root_path . 'language/lang_english/lang_main.'.$phpEx);
            }
        }

        if ( empty($template) )
        {
                        $ThemeSel = get_theme();
                        if (file_exists("themes/$ThemeSel/forums/".$board_config['board_template']."/index_body.tpl")) {
                            $template = new Template("themes/$ThemeSel/forums/".$board_config['board_template']."");
                        } else {
                            $template = new Template($phpbb_root_path . 'templates/' . $board_config['board_template']);
                        }
        }
        if ( empty($theme) )
        {
            $theme = setup_style($board_config['default_style']);
        }

        //
        // Load the Page Header
        //
        if ( !defined('IN_ADMIN') )
        {
                        include("includes/page_header.php");
        }
        else
        {
            include($phpbb_root_path . 'admin/page_header_admin.'.$phpEx);
        }
    }

    switch($msg_code)
    {
        case GENERAL_MESSAGE:
            if ( $msg_title == '' )
            {
                $msg_title = $lang['Information'];
            }
            break;

        case CRITICAL_MESSAGE:
            if ( $msg_title == '' )
            {
                $msg_title = $lang['Critical_Information'];
            }
            break;

        case GENERAL_ERROR:
            if ( $msg_text == '' )
            {
                $msg_text = $lang['An_error_occured'];
            }

            if ( $msg_title == '' )
            {
                $msg_title = $lang['General_Error'];
            }
            break;

        case CRITICAL_ERROR:
            //
            // Critical errors mean we cannot rely on _ANY_ DB information being
            // available so we're going to dump out a simple echo'd statement
            //
            include($phpbb_root_path . 'language/lang_english/lang_main.'.$phpEx);

            if ( $msg_text == '' )
            {
                $msg_text = $lang['A_critical_error'];
            }

            if ( $msg_title == '' )
            {
                $msg_title = 'phpBB : <b>' . $lang['Critical_Error'] . '</b>';
            }
            break;
    }

    //
    // Add on DEBUG info if we've enabled debug mode and this is an error. This
    // prevents debug info being output for general messages should DEBUG be
    // set TRUE by accident (preventing confusion for the end user!)
    //
    if ( DEBUG && ( $msg_code == GENERAL_ERROR || $msg_code == CRITICAL_ERROR ) )
    {
        if ( $debug_text != '' )
        {
            $msg_text = $msg_text . '<br /><br /><b><u>DEBUG MODE</u></b>' . $debug_text;
        }
    }

    if ( $msg_code != CRITICAL_ERROR )
    {
        if ( !empty($lang[$msg_text]) )
        {
            $msg_text = $lang[$msg_text];
        }

        if ( !defined('IN_ADMIN') )
        {
            $template->set_filenames(array(
                'message_body' => 'message_body.tpl')
            );
        }
        else
        {
            $template->set_filenames(array(
                'message_body' => 'admin/admin_message_body.tpl')
            );
        }

        $template->assign_vars(array(
            'MESSAGE_TITLE' => $msg_title,
            'MESSAGE_TEXT' => $msg_text)
        );
        $template->pparse('message_body');

        if ( !defined('IN_ADMIN') )
        {
                        include("includes/page_tail.php");
        }
        else
        {
            include($phpbb_root_path . 'admin/page_footer_admin.'.$phpEx);
        }
    }
    else
    {
        echo "<html>\n<body>\n" . $msg_title . "\n<br /><br />\n" . $msg_text . "</body>\n</html>";
    }

    exit;
}

//
// This function is for compatibility with PHP 4.x's realpath()
// function.  In later versions of PHP, it needs to be called
// to do checks with some functions.  Older versions of PHP don't
// seem to need this, so we'll just return the original value.
// dougk_ff7 <October 5, 2002>
function phpbb_realpath($path)
{
    global $phpbb_root_path, $phpEx;

    return (!@function_exists('realpath') || !@realpath($phpbb_root_path . 'includes/functions.'.$phpEx)) ? $path : @realpath($path);
}

function redirect($url)
{
    global $db, $board_config;

    if (!empty($db))
    {
        $db->sql_close();
    }

    if (strstr(urldecode($url), "\n") || strstr(urldecode($url), "\r"))
    {
        message_die(GENERAL_ERROR, 'Tried to redirect to potentially insecure url.');
    }

    $server_protocol = ($board_config['cookie_secure']) ? 'https://' : 'http://';
    $server_name = preg_replace('#^\/?(.*?)\/?$#', '\1', trim($board_config['server_name']));
    $server_port = ($board_config['server_port'] <> 80) ? ':' . trim($board_config['server_port']) : '';
    $script_name = preg_replace('#^\/?(.*?)\/?$#', '\1', trim($board_config['script_path']));
    $script_name = ($script_name == '') ? $script_name : '/' . $script_name;
    $url = preg_replace('#^\/?(.*?)\/?$#', '/\1', trim($url));

    // Redirect via an HTML form for PITA webservers
    if (@preg_match('/Microsoft|WebSTAR|Xitami/', getenv('SERVER_SOFTWARE')))
    {
        header('Refresh: 0; URL=' . $server_protocol . $server_name . $server_port . $script_name . $url);
        echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><meta http-equiv="refresh" content="0; url=' . $server_protocol . $server_name . $server_port . $script_name . $url . '"><title>Redirect</title></head><body><div align="center">If your browser does not support meta redirection please click <a href="' . $server_protocol . $server_name . $server_port . $script_name . $url . '">HERE</a> to be redirected</div></body></html>';
        exit;
    }

    // Behave as per HTTP/1.1 spec for others
    header('Location: ' . $server_protocol . $server_name . $server_port . $script_name . $url);
    exit;
}
function bblogin($nukeuser, $session_id) {
        global $nukeuser, $userdata, $user_ip, $session_length, $session_id, $db, $nuke_file_path;
        define("IN_LOGIN", true);
        $cookie = explode(":", $nukeuser);
        $nuid = $cookie[0];
        $sql = "SELECT s.*
                FROM " . SESSIONS_TABLE . " s
                WHERE s.session_id = '$session_id'
                AND s.session_ip = '$user_ip'";
        if ( !($result = $db->sql_query($sql)) )
        {
                message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch : session_pagestar');
        }
        $logindata = $db->sql_fetchrow($result);
        if( $nuid != $logindata['session_user_id'] ) {
            $nusername = $cookie[1];
            $sql = "SELECT user_id, username, user_password, user_active, user_level
                    FROM ".USERS_TABLE."
                    WHERE username = '" . str_replace("\'", "''", $nusername) . "'";
            $result = $db->sql_query($sql);
            if(!$result) {
                message_die(GENERAL_ERROR, "Error in obtaining userdata : login", "", __LINE__, __FILE__, $sql);
            }
            $rowresult = $db->sql_fetchrow($result);
            $password = $cookie[2];
            if(count($rowresult) ) {
                if( $rowresult['user_level'] != ADMIN && $board_config['board_disable'] ) {
                    header("Location: " . append_sid("index.php", true));
                } else {
                    if( $password == $rowresult['user_password'] && $rowresult['user_active'] ) {
                        $autologin = 0;
                        $userdata = session_begin($rowresult['user_id'], $user_ip, PAGE_INDEX, $session_length, FALSE, $autologin);
                        $session_id = $userdata['session_id'];
                        if(!$session_id ) {
                            message_die(CRITICAL_ERROR, "Couldn't start session : login", "", __LINE__, __FILE__);
                        } else {
                        }
                    } else {
                        $message = $lang['Error_login'] . "<br /><br />" . sprintf($lang['Click_return_login'], "<a href=\"" . append_sid("modules.php?name=Forums&file=login&$redirect") . "\">", "</a> ") . "<br /><br />" .  sprintf($lang['Click_return_index'], "<a href=\"" . append_sid("index.php") . "\">", "</a> ");
                        message_die(GENERAL_MESSAGE, $message);
                    }
                }
            } else {
                $message = $lang['Error_login'] . "<br /><br />" . sprintf($lang['Click_return_login'], "<a href=\"" . append_sid("modules.php?name=Forums&file=login&$redirect") . "\">", "</a> ") . "<br /><br />" .  sprintf($lang['Click_return_index'], "<a href=\"" . append_sid("index.php") . "\">", "</a> ");
                message_die(GENERAL_MESSAGE, $message);
            }
        }

}
?>