FOSDEM Schedule Viewer. Parses the XML from the FOSDEM site to give a simple HTML interface (.htaccess is optional. This works without it as well!)

.htaccess

Options +FollowSymlinks
RewriteEngine on
RewriteBase /fosdem/
RewriteRule ^(.*) index.php?rewrit

index.php

<?php
/**
 * ScheduleParser - Parses the FOSDEM timetable and outputs it in an "easy to read" format
 *
 * @package default
 * @author Afal
 **/
class ScheduleParser{
        /**
         * SimpleXML object containing the data from the fosdem website.
         */
        private $xml;
        private $levels;
        private $isRewrite;

        public function __construct(){
                $this->xml = simplexml_load_file('http://fosdem.org/schedule/xml');
                $this->levels = array('day','room','event');
                $this->isRewrite = isset($_GET['rewrite']);
                if($this->isRewrite){
                        $this->__rewrite();
                }
        }
  
  private function get_event($room){
                $event = $this->find_in_xml($room, 'event', 'id');
                return sprintf('<h3>%s</h3><em>%s</em><p>%s</p><p><a href="%s">Back</a></p>', $event->title, $event->abstract, $event->description, $this->link_builder(array(), array('event')));
        }

        private function get_room($day){
                $room = $this->find_in_xml($day, 'room', 'name');
                $return = sprintf('<h3>%s</h3>', $room['name']);
                if(isset($_GET['event']))
                        return $return.$this->get_event($room);
                foreach($room->event as $event)
                        $return .= sprintf('<p><a href="%s">%s -&gt; %s</a></p>', $this->link_builder(array('event' => $event['id'])), $event->track, $event->title);
                return $return.sprintf('<p><a href="%s">Back</a></p>', $this->link_builder(array(), array('room')));
        }

        private function get_day(){
                $day = $this->find_in_xml($this->xml, 'day', 'index');
                $return = sprintf('<h3>%s - %s</h3>', date('l', strtotime((string)$day['date'])), $day['date']);
                if(isset($_GET['room']))
                        return $return.$this->get_room($day);
                foreach($day->room as $room){
                        if(sizeof($room->children())){
                                $tracks = array();
                                foreach($room->event as $event)
                                        if(!isset($tracks[(string)$event->track]))
                                                $tracks[(string)$event->track] = true;
                                $return .= sprintf('<p><a href="%s">%s -&gt; %s</a></p>', $this->link_builder(array('room' => $room['name'])), implode(" and ",array_keys($tracks)), $room['name']);
                        }
                }
                return $return.sprintf('<p><a href="%s">Back</a></p>', $this->link_builder(array(), array('day')));
        }

        public function __toString(){
                $conf = $this->xml->conference;
                $return = sprintf('<h1>%s</h1><h2>%s</h2>', $conf->title, $conf->subtitle);
                if(isset($_GET['day']) and $_GET['day'] != '')
                        return $return.$this->get_day();
                //rest of the details???
                foreach($this->xml->day as $day)
                        $return .= sprintf('<p><a href="%s">%s - %s</a></p>', $this->link_builder(array('day' => $day['index'])), date('l', strtotime((string)$day['date'])), $day['date']);
                return $return;
        }

        /**
         * find_in_xml - a simple function to make finding an item in a set easier
         * e.g. event in a room
         *
         * @param $xml  SimpleXML object in which to search in
         * @param $get  Element to find (The $_GET should be the same name)
         * @param $comp The attribute to compare the $_GET to
         * @return SimpleXML object of what is being found otherwise die()
         * @author Afal
         **/
        private function find_in_xml($xml, $get, $comp){
                foreach($xml->$get as $node)
                        if($node[$comp]==$_GET[$get])
                                return $node;
                die(sprintf("<p>%s not found</p>", ucwords($get)));
        }

        /**
         * link_builder - a function for making urls for links easier
         *
         * @param $add    Array to add to $_GET
         * @param $remove Array to remove from $_GET
         * @return String representing the url
         * @author Afal
         **/
        private function link_builder($add=array(), $remove=array()){
                foreach($_GET as $k => $v)
                        if(!isset($add[$k]) and !in_array($k,$remove))
                                 $add[$k] = $v;
                $params = array();
                foreach($add as $k => $v)
                        $params[] = "$k=$v";
                if($this->isRewrite){
                        return $this->rewrite($add);
                }
                else{
                        return "index.php?".implode("&", $params);
                }
        }

        private function rewrite($add){
                $url = preg_replace("/index\.php/","",$_SERVER['SCRIPT_NAME']);
                foreach($this->levels as $level){
                        if(isset($add[$level])){
                                $url .= $add[$level].'/';
                        }
                }
                return $url;
        }

        private function __rewrite(){
                $requestURI = explode('/', $_SERVER['REQUEST_URI']);
                $scriptName = explode('/',$_SERVER['SCRIPT_NAME']);


                for($i= 0;$i < sizeof($scriptName);$i++){
                        if (in_array($requestURI[$i], $scriptName)){
                                unset($requestURI[$i]);
                        }
                }

                $command = array_values($requestURI);
                $levels = $this->levels;
                foreach($command as $comm){
                        if($comm=="") break;
                        $_GET[array_shift($levels)] = $comm;
                }
        }
}
echo new ScheduleParser();