Pastable version of Router class for determining current Controller

<pre class='prettyprint' language='php'>&lt;?php
//Instantiate Router instance
$router = new Router();

//Register legal Controller class names and their include URLs with Router instance
$router-&gt;register('GeneralError', 'include/dir/GeneralError.php');
$router-&gt;register('MainMenu', 'include/dir/MainMenu.php');
$router-&gt;register('GalleryManager', 'include/dir/GalleryManager.php');

//Initiate the Router instance
$router-&gt;route();
?&gt;

&lt;?php
abstract class ARouter
{
        private $legalClassNames = array();
       
        abstract public function route();
        abstract protected function defaultRoute();
       
        public function register($className, $includeUrl)
        {
                $this-&gt;legalClassNames[] = array('className' =&gt; $className, 'includeUrl' =&gt; $includeUrl);
        }
       
        final protected function isLegal($className)
        {
                foreach($this-&gt;legalClassNames as $array)
                {
                        if(in_array($className, $array)) {
                                return true;
                        }
                }
               
                return false;
        }
       
        final protected function includeByClassName($className)
        {
                $includeUrl = $this-&gt;getIncludeUrlByClassName($className);
                include $includeUrl;
        }
       
        private function getIncludeUrlByClassName($className)
        {
                foreach($this-&gt;legalClassNames as $array)
                {
                        if(in_array($className, $array)) {
                                return $array['includeUrl'];
                        }
                }
                return NULL;
        }
}
?&gt;

&lt;?php
class Router extends ARouter
{
        protected function defaultRoute()
        {
                header('Location: index.php?page_name=MainMenu');
        }
       
        public function route()
        {
                if(($_SERVER['REQUEST_METHOD'] == 'POST') || ($_SERVER['REQUEST_METHOD'] == 'GET'))
                {      
                        //Request type is GET or POST
                        $this-&gt;getPageName();
                }
                else
                {
                        //Request type is not GET or POST
                        $this-&gt;defaultRoute();
                }      
        }
       
        protected function getPageName()
        {
                if(!isset($_REQUEST['page_name'])) {
                        $this-&gt;defaultRoute();
                } else if(empty($_REQUEST['page_name'])) {
                        $this-&gt;defaultRoute();
                } else if(!$this-&gt;isLegal($_REQUEST['page_name'])) {
                        $this-&gt;defaultRoute();
                } else {
                        //Page name is a legal class name
                        $this-&gt;initPage($_REQUEST['page_name']);
                }
        }
       
        private function initPage($className)
        {
                $this-&gt;includeByClassName($className);
                $this-&gt;page = new $className();
                $this-&gt;page-&gt;init();
        }
}
?&gt;</pre>
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Pastable version of Router class for determining current Controller