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<?php
/***********************************************************************

  Copyright (C) 2002-2005  Rickard Andersson (rickard@punbb.org)

  This file is part of PunBB.

  PunBB is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published
  by the Free Software Foundation; either version 2 of the License,
  or (at your option) any later version.

  PunBB is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  MA  02111-1307  USA

************************************************************************/


// Tell header.php to use the admin template
define('PUN_ADMIN_CONSOLE', 1);

define('PUN_ROOT', './');
require PUN_ROOT.'include/common.php';
require PUN_ROOT.'include/common_admin.php';


if ($pun_user['g_id'] > PUN_MOD)
    message($lang_common['No permission']);


$action = isset($_GET['action']) ? $_GET['action'] : null;

// Check for upgrade
if ($action == 'check_upgrade')
{
    if (!ini_get('allow_url_fopen'))
        message('Unable to check for upgrade since \'allow_url_fopen\' is disabled on this system.');

    $fp = @fopen('http://www.punbb.org/latest_version', 'r');
    $latest_version = trim(@fread($fp, 16));
    @fclose($fp);

    if ($latest_version == '')
        message('Check for upgrade failed for unknown reasons.');

    $cur_version = str_replace(array('.', 'dev', 'beta', ' '), '', strtolower($pun_config['o_cur_version']));
    $cur_version = (strlen($cur_version) == 2) ? intval($cur_version) * 10 : intval($cur_version);

    $latest_version = str_replace('.', '', strtolower($latest_version));
    $latest_version = (strlen($latest_version) == 2) ? intval($latest_version) * 10 : intval($latest_version);

    if ($cur_version >= $latest_version)
        message('You are running the latest version of PunBB.');
    else
        message('A new version of PunBB has been released. You can download the latest version at <a href="http://www.punbb.org/">PunBB.org</a>.');
}


// Show phpinfo() output
else if ($action == 'phpinfo' && $pun_user['g_id'] == PUN_ADMIN)
{
    // Is phpinfo() a disabled function?
    if (strpos(strtolower((string)@ini_get('disable_functions')), 'phpinfo') !== false)
        message('The PHP function phpinfo() has been disabled on this server.');

    phpinfo();
    exit;
}


// Get the server load averages (if possible)
if (@file_exists('/proc/loadavg') && is_readable('/proc/loadavg'))
{
    // We use @ just in case
    $fh = @fopen('/proc/loadavg', 'r');
    $load_averages = @fread($fh, 64);
    @fclose($fh);

    $load_averages = @explode(' ', $load_averages);
    $server_load = isset($load_averages[2]) ? $load_averages[0].' '.$load_averages[1].' '.$load_averages[2] : 'Not available';
}
else if (!in_array(PHP_OS, array('WINNT', 'WIN32')) && preg_match('/averages?: ([0-9\.]+),[\s]+([0-9\.]+),[\s]+([0-9\.]+)/i', @exec('uptime'), $load_averages))
    $server_load = $load_averages[1].' '.$load_averages[2].' '.$load_averages[3];
else
    $server_load = 'Not available';


// Get number of current visitors
$result = $db->query('SELECT COUNT(user_id) FROM '.$db->prefix.'online WHERE idle=0') or error('Unable to fetch online count', __FILE__, __LINE__, $db->error());
$num_online = $db->result($result);


// Get the database system version
switch ($db_type)
{
    case 'sqlite':
        $db_version = 'SQLite '.sqlite_libversion();
        break;

    default:
        $result = $db->query('SELECT VERSION()') or error('Unable to fetch version info', __FILE__, __LINE__, $db->error());
        $db_version = $db->result($result);
        break;
}


// Collect some additional info about MySQL
if ($db_type == 'mysql' || $db_type == 'mysqli')
{
    $db_version = 'MySQL '.$db_version;

    // Calculate total db size/row count
    $result = $db->query('SHOW TABLE STATUS FROM `'.$db_name.'`') or error('Unable to fetch table status', __FILE__, __LINE__, $db->error());

    $total_records = $total_size = 0;
    while ($status = $db->fetch_assoc($result))
    {
        $total_records += $status['Rows'];
        $total_size += $status['Data_length'] + $status['Index_length'];
    }

    $total_size = $total_size / 1024;

    if ($total_size > 1024)
        $total_size = round($total_size / 1024, 2).' MB';
    else
        $total_size = round($total_size, 2).' KB';
}


// Check for the existance of various PHP opcode caches/optimizers
if (function_exists('mmcache'))
        $php_accelerator = '<a href="Turck">http://turck-mmcache.sourceforge.net/">Turck MMCache</a>';
else if (isset($_PHPA))
        $php_accelerator = '<a href="ionCube">http://www.php-accelerator.co.uk/">ionCube PHP Accelerator</a>';
else if (ini_get('apc.enabled'))
        $php_accelerator ='<a href="Alternative">http://www.php.net/apc/">Alternative PHP Cache (APC)</a>';
else if (ini_get('zend_optimizer.optimization_level'))
        $php_accelerator = '<a href="Zend">http://www.zend.com/products/zend_optimizer/">Zend Optimizer</a>';
else if (ini_get('eaccelerator.enable'))
        $php_accelerator = '<a href="eAcceleratorhttp://eaccelerator.net/">eAccelerator</a>';
else if (ini_get('xcache.cacher'))
        $php_accelerator = '<a href="XCachehttp://trac.lighttpd.net/xcache/">XCache</a>';
else
        $php_accelerator = 'N/A';


$page_title = pun_htmlspecialchars($pun_config['o_board_title']).' / Admin';
require PUN_ROOT.'header.php';

generate_admin_menu('index');

?>
    <div class="block">
        <h2>Forum administration</h2>
        <div id="adintro" class="box">
            <div class="inbox">
                <p>
                    Welcome to the PunBB administration control panel. From here you can control vital aspects of the forum. Depending on whether you are an administrator or a moderator you can<br /><br />
                     - organize categories and forums.<br />
                     - set forum-wide options and preferences.<br />
                     - control permissions for users and guests.<br />
                     - view IP statistics for users.<br />
                     - ban users.<br />
                     - censor words.<br />
                     - set up user ranks.<br />
                     - prune old posts.<br />
                     - handle post reports.
                </p>
            </div>
        </div>

        <h2 class="block2"><span>Statistics</span></h2>
        <div id="adstats" class="box">
            <div class="inbox">
                <dl>
                    <dt>PunBB version</dt>
                    <dd>
                        PunBB <?php echo $pun_config['o_cur_version'] ?> - <a href="admin_index.php?action=check_upgrade">Check for upgrade</a><br />
                        © Copyright 2002, 2003, 2004, 2005 Rickard Andersson
                    </dd>
                    <dt>Server load</dt>
                    <dd>
                        <?php echo $server_load ?> (<?php echo $num_online ?> users online)
                    </dd>
<?php if ($pun_user['g_id'] == PUN_ADMIN): ?>                    <dt>Environment</dt>
                    <dd>
                        Operating system: <?php echo PHP_OS ?><br />
                        PHP: <?php echo phpversion() ?> - <a href="admin_index.php?action=phpinfo">Show info</a><br />
                        Accelerator: <?php echo $php_accelerator."\n" ?>
                    </dd>
                    <dt>Database</dt>
                    <dd>
                        <?php echo $db_version."\n" ?>
<?php if (isset($total_records) && isset($total_size)): ?>                        <br />Rows: <?php echo $total_records."\n" ?>
                        <br />Size: <?php echo $total_size."\n" ?>
<?php endif; endif; ?>                    </dd>
                </dl>
            </div>
        </div>
    </div>
    <div class="clearer"></div>
</div>
<?php

require PUN_ROOT.'footer.php';