AYUDA - ¿Cómo puedo encontrar el código HTML en PHP diseñado un sitio web?

<?php
/*
|---------------------------------------------------------------
| PHP ERROR REPORTING LEVEL
|---------------------------------------------------------------
|
| By default CI runs with error reporting set to ALL.  For security
| reasons you are encouraged to change this when your site goes live.
| For more info visit:  http://www.php.net/error_reporting
|
*/
    error_reporting(E_ALL);
 
/*
|---------------------------------------------------------------
| SYSTEM FOLDER NAME
|---------------------------------------------------------------
|
| This variable must contain the name of your "system" folder.
| Include the path if the folder is not in the same  directory
| as this file.
|
| NO TRAILING SLASH!
|
*/
    $system_folder = "system";
 
/*
|---------------------------------------------------------------
| APPLICATION FOLDER NAME
|---------------------------------------------------------------
|
| If you want this front controller to use a different "application"
| folder then the default one you can set its name here. The folder
| can also be renamed or relocated anywhere on your server.
| For more info please see the user guide:
| http://codeigniter.com/user_guide/gener ... _apps.html
|
|
| NO TRAILING SLASH!
|
*/
    $application_folder = "application";
 
/*
|===============================================================
| END OF USER CONFIGURABLE SETTINGS
|===============================================================
*/
 
 
/*
|---------------------------------------------------------------
| SET THE SERVER PATH
|---------------------------------------------------------------
|
| Let's attempt to determine the full-server path to the "system"
| folder in order to reduce the possibility of path problems.
| Note: We only attempt this if the user hasn't specified a
| full server path.
|
*/
if (strpos($system_folder, '/') === FALSE)
{
    if (function_exists('realpath') AND @realpath(dirname(__FILE__)) !== FALSE)
    {
        $system_folder = realpath(dirname(__FILE__)).'/'.$system_folder;
    }
}
else
{
    // Swap directory separators to Unix style for consistency
    $system_folder = str_replace("\", "/", $system_folder);
}
 
/*
|---------------------------------------------------------------
| DEFINE APPLICATION CONSTANTS
|---------------------------------------------------------------
|
| EXT       - The file extension.  Typically ".php"
| FCPATH    - The full server path to THIS file
| SELF      - The name of THIS file (typically "index.php)
| BASEPATH  - The full server path to the "system" folder
| APPPATH   - The full server path to the "application" folder
|
*/
define('EXT', '.'.pathinfo(__FILE__, PATHINFO_EXTENSION));
define('FCPATH', __FILE__);
define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));
define('BASEPATH', $system_folder.'/');
 
if (is_dir($application_folder))
{
    define('APPPATH', $application_folder.'/');
}
else
{
    if ($application_folder == '')
    {
        $application_folder = 'application';
    }
 
    define('APPPATH', BASEPATH.$application_folder.'/');
}
 
/*
|---------------------------------------------------------------
| LOAD THE FRONT CONTROLLER
|---------------------------------------------------------------
|
| And away we go...
|
*/
require_once BASEPATH.'codeigniter/CodeIgniter'.EXT;
 
/* End of file index.php */
/* Location: ./index.php */