<?php

// Define the sensitive data

define('DATABASE_URL', 'your_database_url');

define('API_KEY', 'your_api_key');

define('SECRET_KEY', 'your_secret_key');

// Function to check if the script is being run directly

if (!$_SERVER['REQUEST_METHOD'] === 'GET' && !$_SERVER['REQUEST_METHOD'] === 'POST') {

// Prevent direct access

header('HTTP/1.0 403 Forbidden');

echo 'Access denied.';

exit;

}

// Function to check for required environment variables

function checkEnvVars($requiredVars) {

foreach ($requiredVars as $var) {

if (!getenv($var)) {

header('HTTP/1.0 500 Internal Server Error');

echo "Error: Missing environment variable: " . $var;

exit;

}

}

}

// Example usage: Check for environment variables (replace with your actual variables)

$requiredVars = ['API_KEY', 'SECRET_KEY'];

checkEnvVars($requiredVars);

// Access sensitive data

$databaseUrl = defined('DATABASE_URL') ? DATABASE_URL : 'default_database_url';

$apiKey = defined('API_KEY') ? API_KEY : 'default_api_key';

$secretKey = defined('SECRET_KEY') ? SECRET_KEY : 'default_secret_key';

// Your script logic here

echo "Database URL: " . $databaseUrl . "<br>";

echo "API Key: " . $apiKey . "<br>";

echo "Secret Key: " . $secretKey . "<br>";

?>