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/* Session functions
---------------------------------------------------------------------------------------------*/

function start_session($db_save=true,$save_path=false)
{
    // Save session in specified path or database
    if ($save_path !== false)
    {
        ini_set('session.save_path',$save_path);
    }
    else if ($db_save === true)
    {
        session_set_save_handler(
            '_open',
            '_close',
            '_read',
            '_write',
            '_destroy',
            '_clean'
        );
    }

    // Start the session
    session_start();
    
    // Regenerate session id if $_SESSION['initiated'] isn't set
    if (!isset($_SESSION['initiated']))
    {
        session_regenerate_id();
        $_SESSION['initiated'] = true;
    }
    
    // Generate a token if there isn't one
    if (!isset($_SESSION['token']))
        $_SESSION['token'] = sha1(md5(uniqid(rand(),true).$_SERVER['HTTP_USER_AGENT']));
}

function _open()
{
    return true;
}

function _close()
{
    return true;
}

function _read($id)
{
    global $db;
 
    if ($result = $db->query('SELECT data FROM %prefix%sessions WHERE id=\''.$db->escape($id).'\''))
    {
        if ($db->num_rows($result))
        {
            $row = $db->fetch($result);
 
            return $row['data'];
        }
    }
 
    return '';
}

function _write($id,$data)
{
    global $db;
 
    return $db->query('REPLACE INTO %prefix%sessions VALUES (\''.$db->escape($id).'\',\''.$db->escape(time()).'\',\''.$db->escape($data).'\')');
}

function _destroy($id)
{
    global $db;
 
    return $db->query('DELETE FROM %prefix%sessions WHERE id=\''.$db->escape($id).'\'');
}

function _clean($max)
{
    global $db;
    
    $old = time() - $max;
 
    return $db->query('DELETE FROM %prefix%sessions WHERE access < \''.$db->escape($old).'\'');
}

##
##        Mod title:  Download Mod
##
##      Mod version:  1.1
##   Works on PunBB:  1.2.* (tested on 1.2.17)
##     Release date:  2008-03-15
##           Author:  Frank Smit (FSX)
##  Project website:  http://code.google.com/p/downloadmod/
##
##      Description:  Adds a download section to your forum.
##
##       Affects DB:  Yes, the config table and the user table
##
##   Affected files:  functions.php, profile.php
##
##            Notes:  This mod only uses the database for the configuration.
##                    All files are fetched from the download folder.
##
##                    If you uninstall this mod you have to manually remove
##                    the downloads folder.
##
##                    This mod doesn't have an upload function, because it
##                    was orginally build for big files ( > 20Mb ).
##
##                    Force download is done by a .htaccess file.
##                    The contents of the .htaccess file are:
##                    <Files *.*>
##                    ForceType applicaton/octet-stream
##                    </Files>
##
##                    This mod has been tested on PHP5, MySQL5 and Apache2.
##
##          Licence:  GPL 2.0
##
##     Generated By:  Auto Read-Me(by Caleb Champlin) - http://www.rscheatnet.com/Auto_Readme.zip
##
##       DISCLAIMER:  Please note that 'mods' are not officially supported by
##                    PunBB. Installation of this modification is done at your
##                    own risk. Backup your forum database and any and all
##                    applicable files before proceeding.

#
#---------[ CHANGELOG 1.0 to 1.1 ]---------------------------------------------------------------
#

 - Fixed bugs and typo's
 - downloadfile.php removed, download file part is added in download.php
 - Added log file, logs what files the user downloads (log can be viewed in the plugin)
 - Added search function
 - Changed category menu
 - Force download is now done with a .htaccess file
 - A index.html file is automaticly placed in a new category
 - Filtering files is now done by one function
 - files that begin with a . [dot] or _ [underscore] are handled like hidden files