root/include/class.seo.php

<?php
/**</span>
<span class="code-comment">*
* @package Ultimate SEO URL phpBB SEO
* @version $Id: phpbb_seo_class.php 236 2010-03-03 08:20:36Z dcz $
* @copyright (c) 2006 - 2010 www.phpbb-seo.com
* @license http://www.opensource.org/licenses/rpl1.5.txt Reciprocal Public License 1.5
*
*/
/**
* phpBB_SEO Class
* www.phpBB-SEO.com
* @package Ultimate SEO URL phpBB SEO
*/

class seo {</span>
<span class="code-keyword">    var    $version = '0.6.4';
    var    $modrtype = 2; // We set it to mixed as a default value
    var    $seo_path = array();
    var    $seo_url = array( 'forum' =>  array(), 'topic' =>  array(), 'user' => array(), 'username' => array(), 'group' => array(), 'file' => array(), 'browse' => array(), 'details' => array() );
    var  $seo_parent = array();
    var    $filter = array(
            'details' =>  array(),
            'browse' =>  array('page' => 0),
            'forum' => array('page' => 'viewforum', 'topicdays' => 0),
            //'forum' => array('st' => 0, 'sk' => 't', 'sd' => 'd'),
            'topic' => array('st' => 0, 'sk' => 't', 'sd' => 'a', 'highlight' => '', 'page' => 'viewtopic', 'postdays' => 0, 'postorder' => 0),
            'search' => array('st' => 0, 'sk' => 't', 'sd' => 'd', 'ch' => '', 'page' => 'search', 'mode' => 'results'),
            'post' => array('page' => 'viewtopic'),
        );

    var    $seo_stop_files = array('posting' => 1, 'ucp' => 1, 'swatch' => 1, 'mcp' => 1);
    var    $seo_stop_vars = array();
    var    $seo_stop_dirs = array();
    var    $seo_delim = array(
            'details' =>  '-t',
            'browse' =>  '-c',
            'forum_cat' => '-c',
            'forum' => '-f',
            'topic' => '-t',
            'userdetails' => '-u',
            'group' => '-g',
            'start' => '-',
            'sr' => '-'
        );
    var    $seo_ext = array(
            'details' =>  '.html',
            'browse' =>  '/',

            'browse_static' =>  '/',

            'phpbb2' => '/',
            'forum_cat' => '/',
            'forum' => '/',
            'topic' => '.html',
            'post' => '.html',
            'index' => '',
            'search' => '.html',
            'userdetails' => '/',
            'group' => '.html',
            'leaders' => '.html',
            'atopic' => '.html',
            'utopic' => '.html',
            'npost' => '.html',
            'pagination' => '.html',
            'gz_ext' => '',
            'comment' =>  '.html',
            'faq' =>  '.html',
            'rules' =>  '.html',
            'login' =>  '.html',
            'signup' =>  '.html',
        );
    var    $seo_static = array(
            'details' =>  'details',
            'browse' =>  'browse',

            'browse_static' =>  'torrents',

            'phpbb2' => 'forum',
            'forum_cat' => 'forum_cat',
            'forum' => 'forum',
            'topic' => 'topic',
            'post' => 'post',
            'index' => '',
            'search' => 'search',
            'userdetails' => 'user',
            'group' => 'group',
            'global_announce' => 'announces',
            'atopic' => 'active-topics',
            'utopic' => 'unanswered',
            'npost' => 'newposts',
            'pagination' => 'page',
            'gz_ext' => '.gz',
            'printertopic' => 'print',
            'comment' =>  'comment',
            'faq' =>  'faq',
            'rules' =>  'rules',
            'login' =>  'login',
            'signup' =>  'signup',
        );
    var    $file_hbase = array();
    var    $get_vars = array();
    var    $path = '';
    var    $start = '';
    var    $filename = '';
    var    $file = '';
    var    $url_in = '';
    var    $url = '';
    var    $page_url = '';
    var    $seo_opt = array(
            'url_rewrite' => false,
            'modrtype' => 2,
//            'sql_rewrite' => false,</span>
<span class="code-comment">            'profile_inj' => false,
            'profile_vfolder' => false,
            'profile_noids' => false,
            'rem_sid' => false,
            'rem_hilit' => false,
            'rem_small_words' => false,
            'virtual_folder' => false,
            'virtual_root' => false,
            'cache_layer' => true, // Forum url caching, by default
            'rem_ids' => false,
        );
    var    $rewrite_method = array();
    var    $paginate_method = array();
    var    $seo_cache = array();
    var    $cache_config = array();
    var    $RegEx = array();
    var    $sftpl = array();
    var    $url_replace = array();
    /**
    * constuctor
    */
    function seo() {
        global $config, $root_path;
        // fix for an interesting bug with parse_str http://bugs.php.net/bug.php?id=48697
        // and apparently, the bug is still here in php5.3
        @ini_set("mbstring.internal_encoding", 'UTF-8');
        // Nothing should be edited here, please do your custom settings in the
        // seo/includes/seo_modules.php instead to make your updates easier.
        // reset the rewrite_method for $root_path
        $this->rewrite_method[$root_path] = array();
        // phpBB files must be treated a bit differently
        $this->seo_static['file'] = array();
        $this->seo_static['file_index'] = 'resources';
        $this->seo_static['thumb'] = 'thumb';
        // Options that may be bypassed by the cached settings.
        $this->cache_config['dynamic_options'] = array_keys($this->seo_opt); // Do not change
        // copyright notice, do not change
        // Caching config
        $this->seo_opt['cache_folder'] = 'cache/'; // Folder where the cache file is stored
        define('SEO_CACHE_PATH', rtrim(realpath($root_path . $this->seo_opt['cache_folder']), '/') . '/'); // do not change
        $this->seo_opt['topic_type'] = array(); // do not change
        $this->seo_opt['topic_last_page'] = array(); // do not change
        $this->cache_config['cache_enable'] = true; // do not change
        $this->cache_config['rem_ids'] = $this->seo_opt['rem_ids']; // do not change, set up above
        $this->cache_config['files'] = array('forum_cat' => 'seo_cache.php', 'forum' => 'seo_cache.php', 'browse' => 'seo_cache.php', 'htaccess' => '.htaccess');
        $this->cache_config['cached'] = false; // do not change
        $this->cache_config['forum'] = array(); // do not change
        $this->cache_config['browse'] = array(); // do not change
        $this->cache_config['topic'] = array(); // do not change
        $this->cache_config['forum_cat'] = array(); // do not change
        $this->cache_config['settings'] = array(); // do not change
        // --> DOMAIN SETTING <-- //
        // Path Settings, only rely on DB
        $server_protocol = ($config['server_protocol']) ? $config['server_protocol'] : (($config['cookie_secure']) ? 'https://' : 'http://');
        $server_name = trim($config['server_name'], '/') . '/';
        $server_port = max(0, (int) $config['server_port']);
        $server_port = ($server_port && $server_port <> 80) ? ':' . $server_port : '';
        $script_path = trim($config['script_path'], '/ ');
        $script_path = (empty($script_path) ) ? '' : $script_path . '/';
        $this->seo_path['root_url'] = strtolower($server_protocol . $server_name . $server_port);
        $this->seo_path['urlR'] = $this->seo_path['url'] =  $this->seo_path['root_url'] . $script_path;
        $this->seo_path['script'] = $script_path;
        $this->seo_path['files'] = $this->seo_path['url'] . 'download/';
        $this->seo_path['canonical'] = '';

        // File setting
        $this->seo_req_uri();
        $this->seo_opt['seo_base_href'] = $this->seo_opt['req_file'] = $this->seo_opt['req_self'] = '';
        if ($script_name = (!empty($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : getenv('PHP_SELF')) {
            // From session.php
            // Replace backslashes and doubled slashes (could happen on some proxy setups)
            $this->seo_opt['req_self'] = str_replace(array('\\', '//'), '/', $script_name);
            // basenamed page name (for example: index)
            $this->seo_opt['req_file'] = urlencode(htmlspecialchars(str_replace(".php", '', basename($this->seo_opt['req_self']))));
        }
        // Load settings from phpbb_seo/includes/seo_modules.php
        if ($this->check_cache()) {
            foreach($this->cache_config['dynamic_options'] as $optionname => $optionvalue ) {
                if (@is_array($this->cache_config['settings'][$optionname])) {
                    $this->seo_opt[$optionname] = array_merge($this->seo_opt[$optionname], $this->cache_config['settings'][$optionname]);
                } elseif ( @isset($this->cache_config['settings'][$optionvalue]) ) {
                    $this->seo_opt[$optionvalue] = $this->cache_config['settings'][$optionvalue];
                }
                if ( isset($config['seo_' . $optionvalue]) ) {
                    $this->seo_opt[$optionvalue] = (bool) $config['seo_' . $optionvalue];
                }
            }
            $this->modrtype = @isset($this->seo_opt['modrtype']) ? $this->seo_opt['modrtype'] : $this->modrtype;
            if ( $this->modrtype > 1 ) { // Load cached URLs
                $this->seo_url['forum_cat'] =& $this->cache_config['forum_cat'];
                $this->seo_url['forum'] =& $this->cache_config['forum'];
                $this->seo_url['browse'] =& $this->cache_config['browse'];
            }
        }
        $this->check_config();
//        $this->seo_path['filesR'] = $this->seo_path['url'] . $this->seo_static['file_index'] . $this->seo_delim['file'];</span>
<span class="code-comment">        if ( ( include($root_path . '/languages/lang_' . $config['default_lang'] . '/lang_convert_table.php') ) !== false ) {
            $this->url_replace = $lang['convert_table'];
        }
        // see if we have some custom replacement
        if (!empty($this->url_replace)) {
            $this->url_replace = array(
                'find' => array_keys($this->url_replace),
                'replace' => array_values($this->url_replace)
            );
        }
        $this->seo_opt['topic_per_page'] = ($config['posts_per_page'] <= 0) ? 1 : $config['posts_per_page']; // do not change

        $this->seo_opt['phpbb2_inj'] = ( $this->seo_ext['phpbb2'] === '/' ? $this->seo_static['phpbb2'] . $this->seo_ext['phpbb2'] : '' );
        // Array of the filenames that require the use of a base href tag.

        $this->file_hbase = array_merge(array(
            'details' => $this->seo_path['url'],
            'browse' => $this->seo_path['url'],
            'phpbb2' => $this->seo_path['url'],
            'viewtopic' => $this->seo_path['url'],
            'forum' => $this->seo_path['url'],
            'userdetails' => $this->seo_path['url'],
            'search' => $this->seo_path['url']
        ), $this->file_hbase);
        // Stop dirs
        $this->seo_stop_dirs = array_merge(array($root_path . 'admin/' => false), $this->seo_stop_dirs);
        // Rewrite functions array : array( 'path' => array('file_name' => 'function_name'));
        // Warning, this way of doing things is path aware, this implies path to be properly sent to append_sid()
        // Allow to add options without slowing down the URL rewriting process
        $this->rewrite_method[$root_path] = array_merge(
            array(
                'viewtopic' => 'viewtopic',
                'viewforum' => 'viewforum',
                'index' => 'index',
                'userdetails' => 'userdetails',
                'search' => 'search',

                'details' => 'details',
                'browse' => 'browse',
                'forum_cat' => 'viewforumcat',
                'phpbb2' => 'phpbb2',
                'comment' => 'comment',
                'faq' => 'faq',
                'rules' => 'rules',
                'login' => 'login',
                'signup' => 'signup',
            ),
            $this->rewrite_method[$root_path]
        );
//        $this->rewrite_method[$root_path . 'download/']['file'] = $this->seo_opt['rewrite_files'] ? 'files' : '';</span>
<span class="code-comment">        $this->paginate_method = array_merge(
            array(
                'topic' => $this->seo_ext['topic'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
                'forum' => $this->seo_ext['forum'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
                'group' => $this->seo_ext['group'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
//                'user' => $this->seo_ext['user'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',</span>
<span class="code-comment">                'atopic' => $this->seo_ext['atopic'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
                'utopic' => $this->seo_ext['utopic'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
                'npost' => $this->seo_ext['npost'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',

                'index' => $this->seo_ext['index'] === '' ? 'rewrite_index_pagination_page' : 'rewrite_tracker_pagination',
                'browse' => $this->seo_ext['browse'] === '/' ? 'rewrite_tracker_pagination_page' : 'rewrite_tracker_pagination',
                'details' => $this->seo_ext['details'] === '/' ? 'rewrite_tracker_pagination_page' : 'rewrite_tracker_pagination',
                'search' => $this->seo_ext['search'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
                'group' => $this->seo_ext['group'] === '/' ? 'rewrite_pagination_page' : 'rewrite_pagination',
                'userdetails' => $this->seo_ext['userdetails'] === '/' ? 'rewrite_tracker_pagination_page' : 'rewrite_tracker_pagination',
            ),
            $this->paginate_method
        );
        $this->RegEx = array_merge(
            array(
                'topic' => array(
                    'check' => '`^' . ($this->seo_opt['virtual_folder'] ? '%1$s/' : '') . '(' . $this->seo_static['topic'] . '|[a-z0-9_-]+' . $this->seo_delim['topic'] . ')$`i',
                    'match' => '`^((([a-z0-9_-]+)(' . $this->seo_delim['forum'] . '([0-9]+))?/)?(' . $this->seo_static['topic'] . '(?!=' . $this->seo_delim['topic'] . ')|.+(?=' . $this->seo_delim['topic'] . '))(' . $this->seo_delim['topic'] . ')?)([0-9]+)$`i',
                    'parent' => 2,
                    'parent_id' => 5,
                    'title' => 6,
                    'id' => 8,
                    'url' => 1,
                ),
                'forum' => array(
                    'check' => '`^' . ($this->seo_opt['virtual_folder'] ? '%1$s/' : '') . '(' . $this->seo_static['forum'] . '|[a-z0-9_-]+' . $this->seo_delim['forum'] . ')$`i',
                    'match' => '`^((([a-z0-9_-]+)(' . $this->seo_delim['forum_cat'] . '([0-9]+))?/)?(' . $this->seo_static['forum'] . '(?!=' . $this->seo_delim['forum'] . ')|.+(?=' . $this->seo_delim['forum'] . '))(' . $this->seo_delim['forum'] . ')?)([0-9]+)$`i',
                    'title' => 6,
                    'id' => 8,
                ),
                'browse' => array(
                    'check' => $this->modrtype >= 2 ? '`^[a-z0-9_-]+(' . $this->seo_delim['browse'] . '[0-9]+)?$`i' : '`^' . $this->seo_static['browse'] . '[0-9]+$`i',
                    'match' => '`^(' . ( $this->seo_opt['virtual_folder'] ? '.*\/' : '') . ')((' . $this->seo_static['browse'] . '|.+)(' . $this->seo_delim['browse'] . '([0-9]+))?)$`i',
                    'title' => '\3',
                    'id' => '\5',
                ),
                'forum_cat' => array(
                    'check' => $this->modrtype >= 2 ? '`^[a-z0-9_-]+(' . $this->seo_delim['forum_cat'] . '[0-9]+)?$`i' : '`^' . $this->seo_static['forum_cat'] . '[0-9]+$`i',
                    'match' => '`^((' . $this->seo_static['forum_cat'] . '|.+)(' . $this->seo_delim['forum_cat'] . '([0-9]+))?)$`i',
                    'title' => '\2',
                    'id' => '\4',
                ),
                'details' => array(
                    'check' => '`^' . ($this->seo_opt['virtual_folder'] ? '%1$s/' : '') . '(' . $this->seo_static['details'] . '|[a-z0-9_-]+' . $this->seo_delim['details'] . ')$`i',
                    'match' => '`^((([a-z0-9_-]+)(' . $this->seo_delim['browse'] . '([0-9]+))?/)?(' . $this->seo_static['details'] . '(?!=' . $this->seo_delim['details'] . ')|.+(?=' . $this->seo_delim['details'] . '))(' . $this->seo_delim['details'] . ')?)([0-9]+)' . str_replace('.', '\.', $this->seo_ext['details']) . '$`i',
                    'parent' => 2,
                    'parent_id' => 5,
                    'title' => 6,
                    'id' => 8,
                    'url' => 1,
                ),
            ),
            $this->RegEx
        );
        // preg_replace() patterns for format_url()
        // One could want to add |th|horn after |slash, but I'm not sure that Þ should be replaced with t and Ð with e
        $this->RegEx['url_find'] = array('`&([a-z]+)(acute|grave|circ|cedil|tilde|uml|lig|ring|caron|slash);`i', '`&(amp;)?[^;]+;`i', '`[^a-z0-9]`i'); // Do not remove : deaccentuation, html/xml entities & non a-z chars
        $this->RegEx['url_replace'] = array('\1', '-', '-');
        if ($this->seo_opt['rem_small_words']) {
            $this->RegEx['url_find'][] = '`(^|-)[a-z0-9]{1,2}(?=-|$)`i';
            $this->RegEx['url_replace'][] = '-';
        }
        $this->RegEx['url_find'][] ='`[-]+`'; // Do not remove : multi hyphen reduction
        $this->RegEx['url_replace'][] = '-';
        // $1 parent : string/
        // $2 title / url : topic-title / forum-url-fxx
        // $3 id
        $this->sftpl = array_merge(
            array(
                'topic' => ($this->seo_opt['virtual_folder'] ? '%1$s' : '') . '%2$s' . $this->seo_delim['topic'] . '%3$s',
                'topic_smpl' => ($this->seo_opt['virtual_folder'] ? '%1$s' : '') . $this->seo_static['topic'] . '%3$s',
                'forum' => ($this->seo_opt['virtual_folder'] ? '%1$s' : '') . '%2$s' . $this->seo_delim['forum'] . '%3$s',
                'forum_cat' => '%2$s' . $this->seo_delim['forum_cat'] . '%3$s',
                'group' => $this->seo_opt['profile_inj'] ? '%2$s' . $this->seo_delim['group'] . '%3$s' : $this->seo_static['group'] . '%3$s',

                'details' => ($this->seo_opt['virtual_folder'] ? '%1$s' : '') . '%2$s' . $this->seo_delim['details'] . '%3$s',
                'browse' => ($this->seo_opt['virtual_folder'] ? '%1$s' : '') . '%2$s' . $this->seo_delim['browse'] . '%3$s',
            ),
            $this->sftpl
        );
        // File setting
        $this->seo_req_uri();
        $this->seo_opt['seo_base_href'] = $this->seo_opt['req_file'] = $this->seo_opt['req_self'] = '';
        if ($script_name = (!empty($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : getenv('PHP_SELF')) {
            // From session.php
            // Replace backslashes and doubled slashes (could happen on some proxy setups)
            $this->seo_opt['req_self'] = str_replace(array('\\', '//'), '/', $script_name);
            // basenamed page name (for example: index)
            $this->seo_opt['req_file'] = urlencode(htmlspecialchars(str_replace(".php", '', basename($this->seo_opt['req_self']))));
        }
        if ( $this->seo_opt['url_rewrite'] && !defined('ADMIN_START') && isset($this->file_hbase[$this->seo_opt['req_file']])) {
            $this->seo_opt['seo_base_href'] = '<base href="' . $this->file_hbase[$this->seo_opt['req_file']] . '"/>';
        }
        return;
    }
    /**
    * will make sure that configured options are consistent
    * @access private
    */
    function check_config() {
        $this->modrtype = max(0, (int) $this->modrtype);
        // For profiles and user messages pages, if we do not inject, we do not get rid of ids
        $this->seo_opt['profile_noids'] = $this->seo_opt['profile_inj'] ? $this->seo_opt['profile_noids'] : false;
        // If profile noids ...
        if ($this->seo_opt['profile_noids']) {
            $this->seo_ext['userdetails'] = '/';
        }
        // Profile ans user messages virtual folder
        if ($this->seo_opt['profile_vfolder']) {
            $this->seo_ext['userdetails'] = '/';
        }
        $this->seo_delim['sr'] = $this->seo_ext['userdetails'] == '/' ? '/' : $this->seo_delim['sr'];
        // If we use virtual folder, we need '/' at the end of the forum URLs
        if ($this->seo_opt['virtual_folder']) {
            $this->seo_ext['forum'] = $this->seo_ext['global_announce'] = $this->seo_ext['browse'] = '/';
        }
        // If the forum cache is not activated
        if (!$this->seo_opt['cache_layer']) {
            $this->seo_opt['rem_ids'] = false;
        }
        // virtual root option
        if ($this->seo_opt['virtual_root'] && $this->seo_path['phpbb_script']) {
            // virtual root is available and activated
            $this->seo_path['urlR'] = $this->seo_path['root_url'];
            $this->file_hbase['index'] = $this->seo_path['url'];
            $this->seo_static['index'] = empty($this->seo_static['index']) ? '/' : $this->seo_static['index'];
        } else {
            // virtual root is not used or usable
            $this->seo_opt['virtual_root'] = false;
        }
        $this->seo_ext['index'] = empty($this->seo_static['index']) ? '' : ( empty($this->seo_ext['index']) ? '.html' : $this->seo_ext['index']);
        // In case url rewriting is deactivated
        if (!$this->seo_opt['url_rewrite'] || $this->modrtype == 0) {
            $this->seo_opt['sql_rewrite'] = false;
            $this->seo_opt['zero_dupe']['on'] = false;
        }
    }
    // --> URL rewriting functions <--
    /**
    * format_url( $url, $type = 'topic' )
    * Prepare Titles for URL injection
    */
    function format_url( $url, $type = 'topic' ) {
        //$url = preg_replace('`\[.*\]`U','',$url);
        if (isset($this->url_replace['find'])) {
            $url = str_replace($this->url_replace['find'], $this->url_replace['replace'], $url);
        }
        $url = htmlentities($url, ENT_COMPAT, 'UTF-8');
        $url = preg_replace($this->RegEx['url_find'] , $this->RegEx['url_replace'], $url);
        $url = strtolower(trim($url, '-'));
        return empty($url) ? $type : $url;
    }
    /**
    * set_url( $url, $id = 0, $type = 'forum', $parent = '' )
    * Prepare url first part and checks cache
    */
    //function set_url( $url, $id = 0, $type = 'forum',  $parent = '') {
    function set_url( $url, $id = 0, $type = 'forum') {
        if ( !empty($this->seo_parent[$type][$id]['urls']) ) {
            $parent = implode('/', $this->seo_parent[$type][$id]['urls']) . '/';
        }
        else {
            $parent = '';
        }

        if ( empty($this->seo_url[$type][$id]) ) {
            $this->seo_parent[$type][$id]['parent_set'] = true;
            $this->seo_url[$type][$id] = ( !empty($this->cache_config[$type][$id]) ? $parent . $this->cache_config[$type][$id] : sprintf($this->sftpl[$type], $parent, $this->format_url($url, $this->seo_static[$type]), $id) );
        }
        elseif ( $parent && empty($this->seo_parent[$type][$id]['parent_set']) ) {
            $this->seo_url[$type][$id] = $parent . $this->seo_url[$type][$id];
            $this->seo_parent[$type][$id]['parent_set'] = true;
        }
        unset($this->seo_parent[$type][$id]['urls']);

        return $this->seo_url[$type][$id];
    }

    /**
    */
    function set_parent( $id = 0, $type = '', $parent_id = '', $parent_type = '' ) {
        $url = ( !empty($this->seo_url[$parent_type][$parent_id]) ? $this->seo_url[$parent_type][$parent_id] : '' );
        $this->seo_parent[$type][$id]['urls'][] = !empty($this->cache_config[$parent_type][$parent_id]) ? $this->cache_config[$parent_type][$parent_id] : $url;
    }
    /**
    * prepare_url( $type, $title, $id, $parent = '', $smpl = false )
    * Prepare url first part
    */
    function prepare_url( $type, $title, $id, $parent = '', $smpl = false ) {
        return empty($this->seo_url[$type][$id]) ? ($this->seo_url[$type][$id] = sprintf($this->sftpl[$type . ($smpl ? '_smpl' : '')], $parent, !$smpl ? $this->format_url($title, $this->seo_static[$type]) : '', $id)) : $this->seo_url[$type][$id];
    }
    /**
    * set_title( $type, $title, $id, $parent = '' )
    * Set title for url injection
    */
    function set_title( $type, $title, $id, $parent = '' ) {
        return empty($this->seo_url[$type][$id]) ? ($this->seo_url[$type][$id] = ($parent ? $parent . '/' : '') . $this->format_url($title, $this->seo_static[$type])) : $this->seo_url[$type][$id];
    }
    /**
    * get_url_info($type, $url, $info = 'title')
    * Get info from url (title, id, parent etc ...)
    */
    function get_url_info($type, $url, $info = 'title') {
        $url = trim($url, '/ ');
        if (preg_match($this->RegEx[$type]['match'], $url, $matches)) {
            return !empty($matches[$this->RegEx[$type][$info]]) ? $matches[$this->RegEx[$type][$info]] : '';
        }
        return '';
    }
    /**
    * check_url( $type, $url, $parent = '')
    * Validate a prepared url
    */
    function check_url( $type, $url, $parent = '') {
        if (empty($url)) {
            return false;
        }
        $parent = !empty($parent) ? (string) $parent : '[a-z0-9/_-]+';
        return !empty($this->RegEx[$type]['check']) ? preg_match(sprintf($this->RegEx[$type]['check'], $parent), $url) : false;
    }
    /**
    * prepare_iurl( $data, $type, $parent = '' )
    * Prepare url first part (not for forums) with SQL based URL rewriting
    */
    function prepare_iurl( $data, $type, $parent = '' ) {
        $id = max(0, (int) $data[$type . '_id']);
        if ( empty($this->seo_url[$type][$id]) ) {
            if (!empty($data[$type . '_url'])) {
                return ($this->seo_url[$type][$id] = $data[$type . '_url'] . $id);
            } else {
                return ($this->seo_url[$type][$id] = sprintf($this->sftpl[$type . ($this->modrtype > 2 ? '' : '_smpl')], $parent, $this->modrtype > 2 ? $this->format_url($data[$type . '_title'], $this->seo_static[$type]) : '', $id));
            }
        }
        return $this->seo_url[$type][$id];
    }
    /**
    * drop_sid( $url )
    * drop the sid's in url
    */
    function drop_sid( $url ) {
        return (strpos($url, 'sid=') !== false) ? trim(preg_replace(array('`&(amp;)?sid=[a-z0-9]*(&amp;|&)?`', '`(\?)sid=[a-z0-9]*`'), array('\2', '\1'), $url), '?') : $url;
    }
    /**
    * simple function to set torrent url with cats and it's set cat url with parents
    * if called where cat urls used to, then no need to call set_cat_url
    * @access public
    */
    function set_torrent_url ( $fid, $name, $cat_id ) {
        global $cache;
        static $cats;

        if ( !isset($cats) ) {
            $cats = $cache->obtain_cats();
        }

        $name = strip_tags(censor_text($name));

        $cat_parent_id = ( isset($cats[$cats[$cat_id]['cat_parent']]['cat_id']) ? $cats[$cats[$cat_id]['cat_parent']]['cat_id'] : 0 );

        if ( $cat_parent_id ) {
            $this->set_url($cats[$cat_parent_id]['cat_name'], $cat_parent_id, $this->seo_static['browse']);
            $this->set_parent($cat_id, $this->seo_static['browse'], $cat_parent_id, $this->seo_static['browse']);
            //$this->set_parent($fid, $this->seo_static['details'], $cat_parent_id, $this->seo_static['browse']);
        }

        $this->set_url($cats[$cat_id]['cat_name'], $cat_id, $this->seo_static['browse']);

        $this->set_parent($fid, $this->seo_static['details'], $cat_id, $this->seo_static['browse']);

        $this->set_url($name, $fid, $this->seo_static['details']);
    }

    /**
    * simple function to set cat url with parents
    * @access public
    */
    function set_cat_url ( $cat_id, $name ) {
        global $cache;
        static $cats;

        if ( !isset($cats) ) {
            $cats = $cache->obtain_cats();
        }

        $name = censor_text($cats[$cat_id]['cat_name']);

        $cat_parent_id = ( isset($cats[$cats[$cat_id]['cat_parent']]['cat_id']) ? $cats[$cats[$cat_id]['cat_parent']]['cat_id'] : 0 );

        if ( $cat_parent_id ) {
            $cat_parent_name = censor_text($cats[$cat_parent_id]['cat_name']);

            $this->set_url($cat_parent_name, $cat_parent_id, $this->seo_static['browse']);
            $this->set_parent($cat_id, $this->seo_static['browse'], $cat_parent_id, $this->seo_static['browse']);
        }

        $this->set_url($name, $cat_id, $this->seo_static['browse']);
    }

    function setForumUrl ( $forumId, $forumName ) {
        global $cache;
        static $forumCats, $forums, $forumsParent;

        if ( !isset($forumCats) ) {
            $forumCats = $cache->obtainForumCats();
        }

        if ( !isset($forumsParent) ) {
            list($forums, $forumsParent) = $cache->obtainForums();
        }

        $forumCat = $forums[$forumId]['cat_id'];
        $forumParentId = ( isset($forums[$forumId]['forum_parent']) ? $forums[$forumId]['forum_parent'] : 0 );

        $this->set_url($forumCats[$forumCat]['cat_title'], $forumCat, $this->seo_static['forum_cat']);

        if ( $forumParentId ) {
        //set parent cat for parent forum
        $this->set_parent($forumParentId, $this->seo_static['forum'], $forumCat, $this->seo_static['forum_cat']);
        $this->set_url($forums[$forumParentId]['forum_name'], $forumParentId, $this->seo_static['forum']);

        $this->set_parent($forumId, $this->seo_static['forum'], $forumParentId, $this->seo_static['forum']);
        }
        else {
        $this->set_parent($forumId, $this->seo_static['forum'], $forumCat, $this->seo_static['forum_cat']);
        }


        $this->set_url($forumName, $forumId, $this->seo_static['forum']);
    }

    /**
    * set_user_url( $username, $user_id = 0 )
    * Prepare profile url
    */
    function set_user_url( $username, $user_id = 0 ) {
        if (empty($this->seo_url['userdetails'][$user_id])) {
            $this->seo_url['username'][$username] = $user_id;
            if ( $this->seo_opt['profile_inj'] ) {
                if ( $this->seo_opt['profile_noids'] ) {
                    $this->seo_url['userdetails'][$user_id] = $this->seo_static['userdetails'] . '/' . $this->seo_url_encode($username);
                } else {
                    $this->seo_url['userdetails'][$user_id] = $this->format_url($username,  $this->seo_delim['userdetails']) . $this->seo_delim['userdetails'] . $user_id;
                }
            } else {
                $this->seo_url['userdetails'][$user_id] = $this->seo_static['userdetails'] . $user_id;
            }
        }
    }
    /**
    * seo_url_encode( $url )
    * custom urlencoding
    */
    function seo_url_encode( $url ) {
        // can be faster to return $url directly if you do not allow more chars than
        // [a-zA-Z0-9_\.-] in your usernames
        // return $url;
        // Here we hanlde the "&", "/", "+" and "#" case proper ( http://www.php.net/urlencode => http://issues.apache.org/bugzilla/show_bug.cgi?id=34602 )
        static $find = array('&', '/', '#', '+');
        static $replace = array('%26', '%2F', '%23', '%2b');
        return rawurlencode(str_replace( $find, $replace, htmlspecialchars_decode(str_replace('&amp;amp;', '%26', rawurldecode($url)))));
    }
    /**
    * url_rewrite($url, $params = false, $is_amp = true, $session_id = false)
    * builds and Rewrite URLs.
    * Allow adding of many more cases than just the
    * regular phpBB URL rewritting without slowing down the process.
    * Mimics append_sid with some shortcuts related to how url are rewritten
    */
    function url_rewrite($url, $params = false, $is_amp = true, $session_id = false) {
        global $userdata, $_SID, $_EXTRA_URL, $root_path;
        $qs = $anchor = '';
        $this->get_vars = array();
        $amp_delim = ($is_amp) ? '&amp;' : '&';
        if (strpos($url, '#') !== false) {
            list($url, $anchor) = explode('#', $url, 2);
            $anchor = '#' . $anchor;
        }
        @list($this->path, $qs) = explode('?', $url, 2);
        if (is_array($params)) {
            if (!empty($params['#'])) {
                $anchor = '#' . $params['#'];
                unset($params['#']);
            }
            $qs .= ($qs ? $amp_delim : '') . $this->query_string($params, $amp_delim, '');
        } elseif ($params) {
            if (strpos($params, '#') !== false) {
                list($params, $anchor) = explode('#', $params, 2);
                $anchor = '#' . $anchor;
            }
            $qs .= ($qs ? $amp_delim : '') . $params;
        }
        // Appending custom url parameter?
        if (!empty($_EXTRA_URL)) {
            $qs .= ($qs ? $amp_delim : '') . implode($amp_delim, $_EXTRA_URL);
        }
        // Sid ?
        if ($session_id === false && !empty($_SID)) {
            $qs .= ($qs ? $amp_delim : '') . "sid=$_SID";
        } else if ($session_id) {
            $qs .= ($qs ? $amp_delim : '') . "sid=$session_id";
        }
        // Build vanilla URL
        if (preg_match("`\.[a-z0-9]+$`i", $this->path) ) {
            $this->file = basename($this->path);
            $this->path = ltrim(str_replace($this->file, '', $this->path), '/');
        } else {
            $this->file = '';
            $this->path = ltrim($this->path, '/');
        }
        $this->url_in = $this->file . ($qs ? '?' . $qs : '');
        $url = $this->path . $this->url_in . $anchor;
        if (isset($this->seo_cache[$url])) {
            return $this->seo_cache[$url];
        }
        if ( !$this->seo_opt['url_rewrite'] || defined('ADMIN_START') || isset($this->seo_stop_dirs[$this->path]) ) {
            return ($this->seo_cache[$url] = $url);
        }
        $this->filename = trim(str_replace(".php", '', $this->file));
        if ( isset($this->seo_stop_files[$this->filename]) ) {
            // add full url
            $url = $this->path == $phpbb_root_path ? $this->seo_path['phpbb_url'] . preg_replace('`^' . $phpbb_root_path . '`', '', $url) : $url;
            return ($this->seo_cache[$url] = $url);
        }
        parse_str(str_replace('&amp;', '&', $qs), $this->get_vars);
        // strp slashes if necessary
        if (defined('STRIP')) {
            $this->get_vars = array_map(array(&$this, 'stripslashes'), $this->get_vars);
        }
        if (empty($userdata['session_logged_in'])) {
            if ( $this->seo_opt['rem_sid'] ) {
                unset($this->get_vars['sid']);
            }
            if ( $this->seo_opt['rem_hilit'] ) {
                unset($this->get_vars['highlight']);
            }
        }
        $this->url = $this->file;
        if ( !empty($this->rewrite_method[$this->path][$this->filename]) ) {
            $this->{$this->rewrite_method[$this->path][$this->filename]}();
            return ($this->seo_cache[$url] = $this->path . $this->url . $this->query_string($this->get_vars, $amp_delim, '?') . $anchor);
        } else {
            return ($this->seo_cache[$url] = $url);
        }
    }
    /**
    * URL rewritting for viewtopic.php
    * With Virtual Folder Injection
    * @access private
    */
    function viewtopic() {
        global $root_path;
        $this->filter_url($this->seo_stop_vars);
        $this->path = $this->seo_path['urlR'];
        if ( !empty($this->get_vars['p']) ) {
            $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_static['post'] . $this->get_vars['p'] . $this->seo_ext['post'];
            unset($this->get_vars['p'], $this->get_vars['f'], $this->get_vars['t'], $this->get_vars['start']);
            return;
        }
        if ( isset($this->get_vars['t']) && !empty($this->seo_url['topic'][$this->get_vars['t']]) ) {
            // Filter default params
            $this->filter_get_var($this->filter['topic']);
            $this->{$this->paginate_method['topic']}($this->seo_ext['topic']);
            $this->print_topic();
            $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_url['topic'][$this->get_vars['t']] . $this->print . $this->start;
            unset($this->get_vars['t'], $this->get_vars['f'], $this->get_vars['p']);
            return;
        } else if (!empty($this->get_vars['t'])) {
            // Filter default params
            $this->filter_get_var($this->filter['topic']);
            $this->{$this->paginate_method['topic']}($this->seo_ext['topic']);
            $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_static['topic'] . $this->get_vars['t'] . $this->start;
            unset($this->get_vars['t'], $this->get_vars['f'], $this->get_vars['p']);
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for viewforum.php
    * @access private
    */
    function viewforum() {
        global $root_path;
        $this->path = $this->seo_path['urlR'];
        $this->filter_url($this->seo_stop_vars);
        if ( isset($this->get_vars['f']) && !empty($this->seo_url['forum'][$this->get_vars['f']]) ) {
            // Filter default params
            $this->filter_get_var($this->filter['forum']);
            $this->{$this->paginate_method['forum']}($this->seo_ext['forum']);
            $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_url['forum'][$this->get_vars['f']] . $this->start;
            unset($this->get_vars['f']);
            return;
        } else if (!empty($this->get_vars['f'])) {
            // Filter default params
            $this->filter_get_var($this->filter['forum']);
            $this->{$this->paginate_method['forum']}($this->seo_ext['forum']);
            $this->url = $this->seo_static['forum'] . $this->get_vars['f'] . $this->start;
            unset($this->get_vars['f']);
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for userdetails.php
    * with nicknames and group name injection
    * @access private
    */
    function userdetails() {
        global $root_path;
        $this->path = $this->seo_path['urlR'];
        if ( !empty($this->get_vars['action']) ) {

            if ( !empty($this->get_vars['id']) ) {
                $url = $this->seo_url['userdetails'][$this->get_vars['id']] . $this->seo_delim['sr'];
            }
            else {
                $url = $this->seo_static['userdetails'] . $this->seo_ext['userdetails'] . $this->get_vars['un'] . $this->seo_delim['sr'];
            }

            switch ( $this->get_vars['action'] ) {
                case 'comments_history':
                    $this->{$this->paginate_method['userdetails']}($this->seo_ext['userdetails']);
                    $this->url = $url . 'comments' . $this->start;
                break;

                default:
                    $this->url = $url . $this->get_vars['action'] . $this->seo_delim['sr'];
                break;

            }

            unset($this->get_vars['action'], $this->get_vars['id'], $this->get_vars['un']);
        }
        elseif ( @isset($this->seo_url['userdetails'][$this->get_vars['id']]) ) {
            $this->url = $this->seo_url['userdetails'][$this->get_vars['id']] . $this->seo_ext['userdetails'];
            unset($this->get_vars['id']);
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for search.php
    * @access private
    */
    function search() {
        global $root_path, $userdata;
        $this->path = $this->seo_path['urlR'];
        $user_id = !empty($this->get_vars['author_id']) ? $this->get_vars['author_id'] : ( isset($this->seo_url['username'][rawurldecode(@$this->get_vars['author'])]) ? $this->seo_url['username'][rawurldecode($this->get_vars['author'])] : 0);
        if ( $user_id && isset($this->seo_url['user'][$user_id]) ) {
            // Filter default params
            $this->filter_get_var($this->filter['search']);
            $this->{$this->paginate_method['user']}($this->seo_ext['user']);
            $sr = (@$this->get_vars['sr'] == 'topics' ) ? 'topics' : 'posts';
            $this->url = $this->seo_url['user'][$user_id] . $this->seo_delim['sr'] . $sr . $this->start;
            unset($this->get_vars['author_id'], $this->get_vars['author'], $this->get_vars['sr']);
            return;
        } elseif ( $this->seo_opt['profile_noids'] && !empty($this->get_vars['author']) ) {
            // Filter default params
            $this->filter_get_var($this->filter['search']);
            $this->rewrite_pagination_page();
            $sr = (@$this->get_vars['sr'] == 'topics' ) ? '/topics' : '/posts';
            $this->url = $this->seo_static['user'] . '/' . $this->seo_url_encode($this->get_vars['author']) . $sr . $this->start;
            unset($this->get_vars['author'], $this->get_vars['author_id'], $this->get_vars['sr']);
            return;
        } elseif ( $this->seo_opt['profile_noids'] && !empty($this->get_vars['search_author']) ) {
            $this->url = $this->seo_static['userdetails'] . $this->seo_delim['sr'] . $this->get_vars['search_author'] . $this->seo_delim['sr'] . 'topics' . $this->seo_ext['userdetails'];
            unset($this->get_vars['search_author']);
            return;
        }
        elseif (!empty($this->get_vars['search_id'])) {
            switch ($this->get_vars['search_id']) {
                case 'active_topics':
                    $this->filter_get_var($this->filter['search']);
                    $this->{$this->paginate_method['atopic']}($this->seo_ext['atopic']);
                    $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_static['atopic'] . $this->start;
                    unset($this->get_vars['search_id'], $this->get_vars['sr']);
                    if (@$this->get_vars['st'] == 7) {
                        unset($this->get_vars['st']);
                    }
                    return;
                case 'unanswered':
                    $this->filter_get_var($this->filter['search']);
                    $this->{$this->paginate_method['utopic']}($this->seo_ext['utopic']);
                    $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_static['utopic'] . $this->start;
                    unset($this->get_vars['search_id']);
                    if (@$this->get_vars['sr'] == 'topics') {
                        unset($this->get_vars['sr']);
                    }
                    return;
                case 'egosearch':
                    global $userdata;
                    $this->set_user_url($userdata['name'], $userdata['uid']);
                    $this->rewrite_pagination_page();
                    $this->url = $this->seo_url['userdetails'][$userdata['uid']] . $this->seo_delim['sr'] . 'topics' . $this->start;
                    unset($this->get_vars['search_id']);
                    return;
                case 'newposts':
                    $this->filter_get_var($this->filter['search']);
                    $this->{$this->paginate_method['npost']}($this->seo_ext['npost']);
                    $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_static['npost'] . $this->start;
                    unset($this->get_vars['search_id']);
                    if (@$this->get_vars['sr'] == 'topics') {
                        unset($this->get_vars['sr']);
                    }
                    return;
            }
        }
        $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_static['search'] . $this->seo_ext['search'];
        //$this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for download/file.php
    * @access private
    */
    function files() {
        $this->filter_url($this->seo_stop_vars);
        $this->path = $this->seo_path['filesR'];
        if (isset($this->get_vars['id']) && !empty($this->seo_url['file'][$this->get_vars['id']])) {
            $this->url = $this->seo_url['file'][$this->get_vars['id']];
            if (!empty($this->get_vars['t'])) {
                $this->url .= $this->seo_delim['file'] . $this->seo_static['thumb'];
            } /*else if (@$this->get_vars['mode'] == 'view') {
                $this->url .= $this->seo_delim['file'] . 'view';
            }*/
            $this->url .= $this->seo_delim['file'] . $this->get_vars['id'];
            unset($this->get_vars['id'], $this->get_vars['t'], $this->get_vars['mode']);
            return;
        }
        $this->path = $this->seo_path['files'];
        return;
    }
    /**
    * URL rewritting for index.php
    * @access private
    */
    function index() {
        global $root_path;
        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            $this->{$this->paginate_method['index']}($this->seo_ext['index']);
            $this->url = $this->seo_static['index'] . $this->start;
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for details.php
    * With Virtual Folder Injection
    * @access private
    */
    function details() {
        global $root_path;
        $this->filter_url($this->seo_stop_vars);
        $this->path = $this->seo_path['urlR'];
        if ( @$this->get_vars['action'] == 'download' && isset($this->get_vars['id']) && !empty($this->seo_url['details'][$this->get_vars['id']]) ) {
            // Filter default params
            $this->filter_get_var($this->filter['details']);
            $this->{$this->paginate_method['details']}($this->seo_ext['details']);
            $this->url = $this->seo_url['details'][$this->get_vars['id']] . '.torrent';
            unset($this->get_vars['id'], $this->get_vars['action']);
            return;
        }
        if ( isset($this->get_vars['id']) && !empty($this->seo_url['details'][$this->get_vars['id']]) ) {
            // Filter default params
            $this->filter_get_var($this->filter['details']);
            $this->{$this->paginate_method['details']}($this->seo_ext['details']);
            $this->url = $this->seo_url['details'][$this->get_vars['id']] . $this->start;
            unset($this->get_vars['id']);
            return;
        } else if (!empty($this->get_vars['id'])) {
            // Filter default params
            $this->filter_get_var($this->filter['details']);
            $this->{$this->paginate_method['details']}($this->seo_ext['details']);
            $this->url = $this->seo_static['details'] . $this->get_vars['id'] . $this->start;
            unset($this->get_vars['id']);
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for browse.php
    * @access private
    */
    function browse() {
        global $root_path;
        $this->path = $this->seo_path['urlR'];
        $this->filter_url($this->seo_stop_vars);
        if ( isset($this->get_vars['cat']) && !empty($this->seo_url['browse'][$this->get_vars['cat']]) ) {
            // Filter default params
            $this->filter_get_var($this->filter['browse']);
            $this->{$this->paginate_method['browse']}($this->seo_ext['browse']);
            $this->url = $this->seo_url['browse'][$this->get_vars['cat']] . $this->start;
            unset($this->get_vars['cat'], $this->get_vars['cat_p']);
            return;
        }

        if ( isset($this->get_vars['search_in']) ) {
            // Filter default params
            $this->filter_get_var($this->filter['browse']);
            $this->{$this->paginate_method['browse']}($this->seo_ext['browse']);

            switch( $this->get_vars['search_in'] ){
                case 1:
                    $this->url = $this->seo_static['browse_static'] . ( !empty($this->get_vars['search']) ? '/name/' . $this->get_vars['search'] : '' ) . $this->start;
                break;
                case 2:
                    $this->url = $this->seo_static['browse_static'] . ( !empty($this->get_vars['search']) ? '/descr/' . $this->get_vars['search'] : '' ) . $this->start;
                break;
                case 3:
                    $this->url = $this->seo_static['browse_static'] . ( !empty($this->get_vars['search']) ? '/tags/' . $this->get_vars['search'] : '' ) . $this->start;
                break;
            } // switch

            unset($this->get_vars['search_in'], $this->get_vars['search']);

            return;
        }

        $this->{$this->paginate_method['browse']}($this->seo_ext['browse_static']);
        $this->url = $this->seo_static['browse_static'] . $this->start;
        return;

        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for phpbb2.php
    * @access private
    */
    function phpbb2() {
        if ( !empty($this->get_vars['page']) ) {
            if ( !empty($this->rewrite_method[$this->path][$this->get_vars['page']]) ) {
                $this->{$this->rewrite_method[$this->path][$this->get_vars['page']]}();
                unset($this->get_vars['page']);
                return;
            }
        }
        elseif ( isset($this->get_vars['c']) ) {
            $this->viewforumcat();
            return;
        }
        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            $this->url = $this->seo_static['phpbb2'] . $this->seo_ext['phpbb2'];
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }

    /**
    * URL rewritting for viewforum.php
    * @access private
    */
    function viewforumcat() {
        global $root_path;
        $this->path = $this->seo_path['urlR'];
        $this->filter_url($this->seo_stop_vars);
        if ( isset($this->get_vars['c']) && !empty($this->seo_url['forum_cat'][$this->get_vars['c']]) ) {
            $this->url = $this->seo_opt['phpbb2_inj'] . $this->seo_url['forum_cat'][$this->get_vars['c']] . $this->seo_ext['forum_cat'];
            unset($this->get_vars['c']);
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for comment.php
    * @access private
    */
    function comment() {
        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            if ( !empty($this->get_vars['cid']) ) {
                $this->url = $this->seo_static['comment'] . $this->get_vars['cid'] . $this->seo_ext['comment'];
                unset($this->get_vars['cid']);
            }
            else {
                $this->url = $this->seo_static['comment'] . $this->seo_ext['comment'];
            }
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for faq.php
    * @access private
    */
    function faq() {

        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            if ( !empty($this->get_vars['mode']) ) {
                $this->url = $this->seo_static['faq'] . '_' . $this->get_vars['mode'] . $this->seo_ext['faq'];
                unset($this->get_vars['mode']);
            }
            else {
                $this->url = $this->seo_static['faq'] . $this->seo_ext['faq'];
            }
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for rules.php
    * @access private
    */
    function rules() {
        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            $this->url = $this->seo_static['rules'] . $this->seo_ext['rules'];
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for login.php
    * @access private
    */
    function login() {
        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            $this->url = $this->seo_static['login'] . $this->seo_ext['login'];
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * URL rewritting for signup.php
    * @access private
    */
    function signup() {
        $this->path = $this->seo_path['urlR'];
        if ($this->filter_url($this->seo_stop_vars)) {
            $this->url = $this->seo_static['signup'] . $this->seo_ext['signup'];
            return;
        }
        $this->path = $this->seo_path['url'];
        return;
    }
    /**
    * Returns true if the user can edit urls
    * @access public
    */
    function url_can_edit($forum_id = 0) {
        global $userdata, $auth;
        if (empty($this->seo_opt['sql_rewrite']) || empty($userdata['session_logged_in'])) {
            return false;
        }
        if ($auth->acl_get('a_')) {
            return true;
        }
        // un comment to grant url edit perm to moderators in at least a forums
        /*if ($auth->acl_getf_global('m_')) {
            return true;
        }*/
        $forum_id = max(0, (int) $forum_id);
        if ($forum_id && $auth->acl_get('m_', $forum_id)) {
            return true;
        }
        return false;
    }
    /**
    * Will break if a $filter pattern is foundin $url.
    * Example $filter = array("view=", "mark=");
    * @access private
    */
    function filter_url($filter = array()) {
        foreach ($filter as $patern ) {
            if ( strpos($this->url_in, $patern) !== false ) {
                $this->get_vars = array();
                $this->url = $this->url_in;
                return false;
            }
        }
        return true;
    }
    /**
    * Will unset all default var stored in $filter array.
    * Example $filter = array('st' => 0, 'sk' => 't', 'sd' => 'a', 'hilit' => '');
    * @access private
    */
    function filter_get_var($filter = array()) {
        if ( !empty($this->get_vars) ) {
            foreach ($this->get_vars as $paramkey => $paramval) {
                if ( isset($filter[$paramkey]) ) {
                    if ( $filter[$paramkey] ==  $this->get_vars[$paramkey] || !isset($this->get_vars[$paramkey])) {
                        unset($this->get_vars[$paramkey]);
                    }
                }
            }
        }
        return;
    }
    /**
    * Appends the GET vars in the query string
    * @access public
    */
    function query_string($get_vars = array(), $amp_delim = '&amp;', $url_delim = '?') {
        if(empty($get_vars)) {
            return '';
        }
        $params = array();
        foreach($get_vars as $key => $value) {
            if (is_array($value)) {
                foreach($value as $k => $v) {
                    $params[] = $key . '[' . $k . ']=' . $v;
                }
            } else {
                $params[] = $key . (!trim($value) ? '' : '=' . $value);
            }
        }
        return $url_delim . implode($amp_delim , $params);
    }
    /**
    * rewrite pagination, simple
    * -xx.html
    */
    function rewrite_pagination($suffix) {
        $this->start = $this->seo_start( @$this->get_vars['start'] ) . $suffix;
        unset($this->get_vars['start']);
    }
    /**
    * rewrite pagination, virtual folder
    * /pagexx.html
    */
    function rewrite_pagination_page() {
        $this->start = '/' . $this->seo_start_page( @$this->get_vars['start'] );
        unset($this->get_vars['start']);
    }
    /**
    * rewrite pagination, virtual folder
    * /pagexx.html
    */
    function rewrite_index_pagination_page() {
        $this->start = ( @$this->get_vars['page'] ? $this->seo_start_page( $this->get_vars['page'] ) : '' );
        unset($this->get_vars['page']);
    }
    /**
    * rewrite pagination, simple
    * -xx.html
    */
    function rewrite_tracker_pagination($suffix) {
        $this->start = $this->seo_start( @$this->get_vars['page'] ) . $suffix;
        unset($this->get_vars['page']);
    }
    /**
    * rewrite pagination, virtual folder
    * /pagexx.html
    */
    function rewrite_tracker_pagination_page() {
        $this->start = '/' . $this->seo_start_page( @$this->get_vars['page'] );
        unset($this->get_vars['page']);
    }
    /**
    * Returns usable start param
    * -xx
    */
    function seo_start($start) {
        return ($start >= 1 ) ? $this->seo_delim['start'] . (int) $start : '';
    }
    /**
    * Returns usable start param
    * pagexx.html
    * Only used in virtual folder mode
    */
    function seo_start_page($start) {
        return ($start >=1 ) ? $this->seo_static['pagination'] . (int) $start . $this->seo_ext['pagination'] : '';
    }


    function print_topic () {
        $this->print = ( isset($this->get_vars['printertopic']) ? '_' . $this->seo_static['printertopic'] . ( isset($this->get_vars['finish_rel']) ? '-full' : '' ) : '' );
        unset($this->get_vars['printertopic']);
        unset($this->get_vars['finish_rel']);
    }
    /**
    * Returns the full REQUEST_URI
    */
    function seo_req_uri() {
        if ( !empty($_SERVER['HTTP_X_REWRITE_URL']) ) { // IIS  isapi_rewrite
            $this->seo_path['uri'] = ltrim($_SERVER['HTTP_X_REWRITE_URL'], '/');
        } elseif ( !empty($_SERVER['REQUEST_URI']) ) { // Apache mod_rewrite
            $this->seo_path['uri'] = ltrim($_SERVER['REQUEST_URI'], '/');
        } else { // no mod rewrite
            $this->seo_path['uri'] =  ltrim($_SERVER['SCRIPT_NAME'], '/') . ( ( !empty($_SERVER['QUERY_STRING']) ) ? '?'.$_SERVER['QUERY_STRING'] : '' );
        }
        $this->seo_path['uri'] = str_replace( '%26', '&', rawurldecode($this->seo_path['uri']));
        // workaround for FF default iso encoding
        //if (!$this->is_utf8($this->seo_path['uri'])) {
        //    $this->seo_path['uri'] = utf8_normalize_nfc(utf8_recode($this->seo_path['uri'], 'iso-8859-1'));
        //}
        $this->seo_path['uri'] = $this->seo_path['root_url'] . $this->seo_path['uri'];
        return $this->seo_path['uri'];
    }
    // -> Cache functions
    /**
    * forum_id(&$forum_id, $forum_uri = '')
    * will tell the forum id from the uri or the forum_uri GET var by checking the cache.
    */
    function get_id_from_uri(&$id, $uri = '', $type = 'browse') {
        if (empty($uri)) {
            $uri = request_var('uri', '');
            unset($_GET['uri'], $_REQUEST['uri']);
        }
        if (empty($uri)) {
            return 0;
        }
        $uri = end(explode('/', $uri));
        if ( isset($this->cache_config[$type . '_flip'][$uri]) ) {
            $_id = $this->cache_config[$type . '_flip'][$uri];
            $id = max(0, (int) $_id);
        } elseif ( $_id = $this->get_url_info($type, $uri, 'id')) {
            $id = max(0, (int) $_id);
        }
        return $id;
    }
    /**
    * check_cache() will tell if the required file exists.
    * @access private
    */
    function check_cache( $type = 'forum', $from_bkp = false ) {
        $file = SEO_CACHE_PATH . @$this->cache_config['files'][$type];
        if( !$this->cache_config['cache_enable'] || !isset($this->cache_config['files'][$type]) || !file_exists($file) ) {
            $this->cache_config['cached'] = false;
            return false;
        }
        include($file);
        if (is_array($this->cache_config[$type]) ) {
            $this->cache_config['cached'] = true;
            return true;
        } else {
            if ( !$from_bkp ) {
                // Try the current backup
                @copy($file . '.current', $file);
                $this->check_cache( $type, true );
            }
            $this->cache_config['cached'] = false;
            return false;
        }
    }
    /**
    * is_utf8($string)
    * Borrowed from php.net : http://www.php.net/mb_detect_encoding (detectUTF8)
    */
    function is_utf8($string) {
        // non-overlong 2-byte|excluding overlongs|straight 3-byte|excluding surrogates|planes 1-3|planes 4-15|plane 16
        return preg_match('%(?:[\xC2-\xDF][\x80-\xBF]|\xE0[\xA0-\xBF][\x80-\xBF]|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}|\xED[\x80-\x9F][\x80-\xBF] |\xF0[\x90-\xBF][\x80-\xBF]{2}|[\xF1-\xF3][\x80-\xBF]{3}|\xF4[\x80-\x8F][\x80-\xBF]{2})+%xs', $string);
    }
    /**
    * stripslashes($value)
    * Borrowed from php.net : http://www.php.net/stripslashes
    */
    function stripslashes($value) {
        return is_array($value) ? array_map(array(&$this, 'stripslashes'), $value) : stripslashes($value);
    }
    // --> Add on Functions <--
    // --> Gen stats
    /**
    * Returns usable microtime
    * Borrowed from php.net
    */
    function microtime_float() {
        return array_sum(explode(' ',microtime()));
    }
} // End of the seo class
?>