Probleme $ premiere page

Bonjour je viens de regarder le tutoriel php jour 4 et j'ai un probleme sur ma premiere page :

Call Stack
#   Time    Memory  Function    Location
1   0.0006  247416  {main}( )   ..\index.php:0
2   0.0146  360376  Dispatcher->__construct( )  ..\index.php:9
3   0.0146  360824  Router::parse( )    ..\Dispatcher.php:8
4   0.0146  361000  preg_match ( )  ..\Router.php:17

( ! ) Warning: preg_match(): Unknown modifier '$' in C:\wamp\www\emmy\core\Router.php on line 17
Call Stack
#   Time    Memory  Function    Location
1   0.0006  247416  {main}( )   ..\index.php:0
2   0.0146  360376  Dispatcher->__construct( )  ..\index.php:9
3   0.0146  360824  Router::parse( )    ..\Dispatcher.php:8
4   0.0163  361968  preg_match ( )  ..\Router.php:17

( ! ) Warning: preg_match(): Unknown modifier '$' in C:\wamp\www\emmy\core\Router.php on line 17
Call Stack
#   Time    Memory  Function    Location
1   0.0006  247416  {main}( )   ..\index.php:0
2   0.0146  360376  Dispatcher->__construct( )  ..\index.php:9
3   0.0146  360824  Router::parse( )    ..\Dispatcher.php:8
4   0.0199  361968  preg_match ( )  ..\Router.php:17

router.php :

<?php
class Router{

    static $routes = array();

    /**
    * Permet de parser une url
    * @param $url Url à parser
    * @return tableau contenant les paramètres
    **/
    static function parse($url,$request){
        $url = trim($url, '/');
        if(empty($url)){
            $url = Router::$routes[0]['url'];
        }else{
            foreach(Router::$routes as $v){
                if(preg_match($v['catcher'],$url,$match)){
                    $request->controller = $v['controller'];
                    $request->action = isset($match['action']) ? $match['action'] : $v['action'];
                    $request->params = array();
                        foreach($v['params'] as $k=>$v){
                            $request->params[$k] = $match[$k];
                }
                if(!empty($match['args'])){
                    $request->params += explode('/',trim($match['args'],'/'));
                }
                return $request;
            }
        }

        }
        $params = explode('/',$url);
        $request->controller = $params[0];
        $request->action = isset($params[1]) ? $params[1] : 'index';
        $request->params = array_slice($params,2);
        return true;
    }

    static function connect($redir,$url){
        $r = array();

        $r['params'] = array();
        $r['url'] = $url;
        $r['redir'] = $redir;
        $r['origin'] = str_replace(':action','(?P<action>([a-z0-9]+))',$url);
        $r['origin'] = preg_replace('/([a-z0-9]+):([^\/]+)/','${1}:(?P<${1}>${2})',$r['origin']);
        $r['origin'] = '/^'.str_replace('/','\/', $r['origin']).'(?P<args>\/?.*)$/';
        $params = explode('/',$url);
        foreach($params as $k=>$v){
            if(strpos($v,':')){
                $p = explode(':',$v);
                $r['params'][$p[0]] = $p[1];

            }else{
                if($k==0){
                    $r['controller'] = $v;
                }elseif($k==1){
                    $r['action'] = $v;
                }
            }
        }
        $r['catcher'] = $redir;
        $r['catcher'] = str_replace(':action','(?P<action>([a-z0-9]+))',$r['catcher']);
        foreach($r['params'] as $k=>$v){
            $r['catcher'] = str_replace(":$k","(?P<$k>$v)",$r['catcher']);
        }
        $r['catcher'] = '/^'.str_replace('/','\/', $r['catcher']).'(?P<args>\/?.*)/$';
        self::$routes[] = $r;
    }

    static function url($url){
        foreach(self::$routes as $v){
            if(preg_match($v['origin'],$url,$match)){
                foreach($match as $k=>$w){
                    if(!is_numeric($k)){
                        $v['redir'] = str_replace(":$k",$w,$v['redir']);
                    }
                }
                return BASE_URL.'/'.$v['redir'].$match['args'];
            }
        }
        return BASE_URL.'/'.$url;
    }

}
?>