Router.php

<?php

class Router
{
    /**
     * An array of the routes keyed by URI.
     *
     * @var array
     */
    protected $routes = [];
    
    /**
     * An array of view paths to search for views.
     *
     * @var array
     */
    protected $viewPaths = [''];
    
    /**
     * Create an instance of the router.
     * 
     * @return void;
    */
    public function __construct()
    {
        $this->basePath = dirname(__DIR__);
    }
    
    /**
     * Add a route to the routes collection.
     *
     * @param  array|string  $url
     * @param  string|null  $view
     * @return this
     */
    public function add($url, $view = null)
    {
      	// If the url is an array, let's quickly iterate through them and
        // add them to the collection. Otherwise, we'll register the single
        // route and return the router instance.
        if (func_num_args() === 1 && is_array($url)) {
            foreach ($url as $path => $view) {
                $this->routes[$path] = $view;
            }
            
            return $this;
        }

        $this->routes[$url] = $view;
        
        return $this;
    }
    
    /**
     * Find the route that match the request url.
     *
     * @param string  $url
     * @return string
     */
    public function match($url)
    {
        // We'll first look through the list of defined routes
        // and if there's a match, we'll just return that, otherwise,
        // we'll search through the viewpaths to look for a view matching the
        // route.
        if (isset($this->routes[$url])) {
            return $this->getViewPath().$this->routes[$url];
        }
   		
      	// This basically matches and captures the path of the url.
      	//For example: /products/asun :)
        preg_match('/(.*\/(.*))/', $url, $matches);
        
      	// We might have multiple view paths to search for views.
      	// We'll go through them and try to match the view with the route
        foreach ($this->viewPaths as $path) {
            if (@file_exists($matchedPath = $this->getViewPath($path).$path.end($matches).'.php')) {
                return $matchedPath;
            }
        }
        
      	// Add a fallback route for when there's no match for the current request.
        return $this->getViewPath().'404.php';
    }
    
    /**
     * Get the path to the views.
     *
     * @return string
     */
    protected function getViewPath()
    {
        return $this->basePath.DIRECTORY_SEPARATOR.'views'.DIRECTORY_SEPARATOR;
    }
}