A CodeIgniter controller used for static sites

staticx.php

<?php

class Staticx extends CI_Controller {

    /**
     * This action must be configured as a "catch-all" url inside 
     * application/config/routes.php  You can do this by adding the following
     * line to that file:
     *
     * $route['(:any)'] = 'staticx/route/$1';
     */
    public function route() {
        $page_data = array();

        if ($page = $this->_is_route_valid(func_get_args())) {
            $page_data = $this->_get_page_data($page) + array(
                'view' => $this->load->view($page, '', true)
            );
        }

        $this->load->view('layout', $page_data);
    }

    /**
     * Here you can define the variables you want to be able to define in your
     * view files, and use in your layout file.
     */
    public function get_available_page_data() {
        return array(
            'page_title' => 'Page Title',
            'meta_keywords' => 'Meta Keywords',
        );
    }

    /**
     * Verifies that a view file exists for the path called.
     *
     * @param array $route - The arguments passed to the route() method
     * @return mixed string or false if route is invalid
     */
    private function _is_route_valid($route) {
        $page =  implode('/', $route);
        if (file_exists(APPPATH . "views/$page.php")) {
            return $page;
        }

        return FALSE;
    }

    /**
     * Inspired by/Taken from Wordpress function get_file_data() in wp-includes/functions.php
     *
     * @see http://codex.wordpress.org/File_Header
     */
    private function _get_page_data($page) {
        $file_data = $this->_get_file_data($page);
        $headers   = $this->get_available_page_data();

        foreach($headers as $field => $regex) {
		    preg_match('/^[ \t\/*#]*' . preg_quote($regex, '/') . ':(.*)$/mi', $file_data, ${$field});
    		if ( ! empty(${$field})) {
                ${$field} = $this->_cleanup_header_comment(${$field}[1]);
            } else {
    			${$field} = '';
            }
    	}
    
        return compact(array_keys($headers));
    }

    private function _get_file_data($page) {
        $fp = fopen(APPPATH . "views/$page.php", 'r');
        $file_data = fread($fp, 8192);
        fclose($fp);

        return $file_data;
    }


    /**
     * Inspired by/Taken from Wordpress; in wp-includes/functions.php
     *
     * @param string $str
     * @return string
     */
    private function _cleanup_header_comment($str) {
        return trim(preg_replace("/\s*(?:\*\/|\?>).*/", '', $str));
    }

}