How can PHP files be encrypted to prevent unauthorized access to code?

To prevent unauthorized access to PHP code, you can encrypt the PHP files using a tool like ionCube or Zend Guard. These tools will encode the PHP files into a format that is unreadable without the corresponding decoder. This helps protect your code from being accessed or modified by unauthorized users.

// Sample code snippet to encrypt PHP files using ionCube
// This is just an example and may require additional configuration

// Install ionCube on your server and use the command line tool to encrypt your PHP files
// Example: ioncube_encoder /path/to/your/php/file.php