How can one troubleshoot and resolve issues related to accessing specific pages directly in PHP websites?

One common issue when accessing specific pages directly in PHP websites is incorrect file paths or missing files. To troubleshoot this issue, check the file paths in your code and ensure that the files exist in the correct directories. Additionally, make sure that the necessary files are included or required in the PHP files to access them directly.

<?php
// Check and correct file paths
include_once 'header.php';
include_once 'content.php';
include_once 'footer.php';
?>