What are the potential security risks associated with the PHP Cache-Script problem described in the forum thread?

The PHP Cache-Script problem described in the forum thread involves a vulnerability where sensitive information, such as database credentials, may be exposed if the cache file is accessed directly. To solve this issue, it is recommended to store sensitive information in a separate configuration file outside of the web root directory and include it in the main PHP script.

// config.php
<?php
$db_host = 'localhost';
$db_user = 'username';
$db_pass = 'password';
$db_name = 'database';
?>

// index.php
<?php
include('../config.php');

// rest of the PHP code
?>