Are encryption modules for PHP files commonly used to protect code from being accessed?

Encryption modules for PHP files are commonly used to protect code from being accessed by unauthorized users. By encrypting the PHP files, the code becomes unreadable to anyone without the decryption key, adding an extra layer of security to the application. This can help prevent sensitive information or proprietary algorithms from being stolen or tampered with.

// Example of encrypting a PHP file using OpenSSL encryption
$plaintext = file_get_contents('example.php');
$key = openssl_random_pseudo_bytes(32);
$iv = openssl_random_pseudo_bytes(16);
$ciphertext = openssl_encrypt($plaintext, 'aes-256-cbc', $key, 0, $iv);
file_put_contents('example_encrypted.php', $ciphertext);