Email Address Encryption Tool - Protect Your Email from Spam

<?php
// Simple and secure contact form processor
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    exit('Method Not Allowed');
}

// Decode recipient email (Base64 from hidden field)
$recipient = isset($_POST['recipient']) ? base64_decode($_POST['recipient']) : '';
$name = isset($_POST['sender_name']) ? trim($_POST['sender_name']) : '';
$email = isset($_POST['sender_email']) ? trim($_POST['sender_email']) : '';
$message = isset($_POST['message']) ? trim($_POST['message']) : '';

// Basic validation
if (!$recipient || !$name || !$email || !$message || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
    exit('Invalid form submission. Please fill in all fields correctly.');
}

// Prevent header injection
if (preg_match('/[\\r\\n]/', $name) || preg_match('/[\\r\\n]/', $email)) {
    exit('Invalid input detected.');
}

$subject = "Contact Form Message from $name";
$body = "Name: $name\nEmail: $email\nMessage:\n$message";
$headers = "From: $name <$email>\r\nReply-To: $email";

if (mail($recipient, $subject, $body, $headers)) {
    echo '<div style="max-width:500px;margin:40px auto;padding:30px;background:#f0fdf4;border-radius:10px;border:2px solid #22c55e;text-align:center;font-family:sans-serif;">
    <h2 style="color:#15803d;">Thank you!</h2>
    <p>Your message has been sent successfully.</p>
    <a href="contact.html" style="display:inline-block;margin-top:20px;padding:10px 24px;background:#9C9AEC;color:#fff;border-radius:6px;text-decoration:none;font-weight:bold;">
    Back to Contact Form
    </a>
    </div>';
} else {
    echo '<div style="max-width:500px;margin:40px auto;padding:30px;background:#fef2f2;border-radius:10px;border:2px solid #ef4444;text-align:center;font-family:sans-serif;">
    <h2 style="color:#b91c1c;">Error</h2>
    <p>Sorry, there was a problem sending your message. Please try again later.</p>
    <a href="contact.html" style="display:inline-block;margin-top:20px;padding:10px 24px;background:#9C9AEC;color:#fff;border-radius:6px;text-decoration:none;font-weight:bold;">
    Back to Contact Form
    </a>
    </div>';
}
?>