How secure are PHP scripts stored on a server?

PHP scripts stored on a server can be secure if proper measures are taken to protect them. One common way to enhance security is by placing PHP scripts outside of the web root directory to prevent direct access. Additionally, using secure coding practices, such as input validation and output escaping, can help prevent common security vulnerabilities like SQL injection and cross-site scripting attacks.

<?php
// Place this code in a .htaccess file in the directory where PHP scripts are stored
deny from all
?>