How can one ensure that PHP scripts running on a Raspberry Pi are secure and do not violate any terms of service?

To ensure that PHP scripts running on a Raspberry Pi are secure and do not violate any terms of service, you can implement security measures such as input validation, sanitization, and using secure coding practices. Additionally, you should regularly update your PHP version and keep your Raspberry Pi's operating system up to date to patch any security vulnerabilities.

<?php
// Example of input validation and sanitization
$input = $_POST['user_input'];
$clean_input = filter_var($input, FILTER_SANITIZE_STRING);

// Example of secure coding practices
$password = password_hash($_POST['password'], PASSWORD_DEFAULT);

// Regularly update PHP version and Raspberry Pi's operating system
// Update PHP by running: sudo apt-get update && sudo apt-get upgrade
// Update Raspberry Pi OS by running: sudo apt update && sudo apt full-upgrade
?>