Project: Piwigo
Code Location: http://piwigo.org/svn/trunk/trunk
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random.php
<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based photo gallery                                    |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2014 Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | 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                                          |
// |                                                                       |
// | This program 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.                                                                  |
// +-----------------------------------------------------------------------+

// +-----------------------------------------------------------------------+
// |                          define and include                           |
// +-----------------------------------------------------------------------+

define('PHPWG_ROOT_PATH','./');
include_once( PHPWG_ROOT_PATH.'include/common.inc.php' );

// +-----------------------------------------------------------------------+
// | Check Access and exit when user status is not ok                      |
// +-----------------------------------------------------------------------+
check_status(ACCESS_GUEST);

// +-----------------------------------------------------------------------+
// |                     generate random element list                      |
// +-----------------------------------------------------------------------+

$query = '
SELECT id
  FROM '.IMAGES_TABLE.'
    INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id
'.get_sql_condition_FandF
  (
    array
      (
        'forbidden_categories' => 'category_id',
        'visible_categories' => 'category_id',
        'visible_images' => 'id'
      ),
    'WHERE'
  ).'
  ORDER BY '.DB_RANDOM_FUNCTION.'()
  LIMIT '.min(50, $conf['top_number'],$user['nb_image_page']).'
;';

// +-----------------------------------------------------------------------+
// |                                redirect                               |
// +-----------------------------------------------------------------------+

redirect(make_index_url(array('list' => array_from_query($query, 'id'))));
?>