What are some alternative approaches to randomly selecting and loading source code in PHP that may be more efficient or secure?

When randomly selecting and loading source code in PHP, one alternative approach is to use a secure random number generator to ensure unpredictability and reduce the risk of vulnerabilities such as injection attacks. Additionally, utilizing a whitelist of allowed files or directories can help prevent unauthorized access to sensitive code. Finally, caching frequently accessed code can improve performance by reducing the need for repeated random selection and loading.

// Securely select and load source code
$allowed_files = ['file1.php', 'file2.php', 'file3.php']; // Whitelist of allowed files

$random_index = random_int(0, count($allowed_files) - 1); // Secure random number generation
$selected_file = $allowed_files[$random_index];

if (in_array($selected_file, $allowed_files)) {
    include $selected_file; // Load the selected file
} else {
    // Handle unauthorized access
    die('Unauthorized access');
}