Contact-Form-PHP

A modern, secure and lightweight contact form for PHP projects
Built with Bootstrap 5, AJAX, PHPMailer, and Google reCAPTCHA v3 — no jQuery, no bloat
🔐 Designed with security, performance and accessibility in mind

✨ Features

• PHP 8+ Ready – Strict types & modern code
• Bootstrap 5 UI – Responsive and accessible
• AJAX Submission – No page reload
• Google reCAPTCHA v3 – Invisible spam protection
• PHPMailer SMTP – Secure email delivery
• Auto-reply – User confirmation message
• Honeypot trap – Basic anti-bot protection
• Rate limiting – Prevents abuse (default: 5/hour)
• Easy customization – Fields, messages & styles
• Regex-based bot User-Agent blocking
• DNS email domain (MX/A) validation
• reCAPTCHA v3 verification – Default threshold 0.6
• Header injection and XSS protection

🚀 Live Demo

🔗 Try it here

📦 Quick Start

1. Clone or download the repo:

   git clone https://github.com/raspgot/Contact-Form-PHP.git

   Or download ZIP and extract it

2. Run locally with PHP:

   Use a local PHP server like XAMPP, MAMP or PHP's built-in server:

   php -S localhost:8000

⚙️ Setup

1. Configure backend

Get your reCAPTCHA secret key from the Google reCAPTCHA Console

Edit AjaxForm.php with your credentials:

const SECRET_KEY    = 'your_recaptcha_secret_key';
const SMTP_HOST     = 'smtp.yourprovider.com';
const SMTP_USERNAME = 'you@example.com';
const SMTP_PASSWORD = 'yourpassword';
const SMTP_SECURE   = 'tls';
const SMTP_PORT     = 587;

Note: Enable php_curl in php.ini This extension allows PHP to make HTTP requests (to verify reCAPTCHA or send emails via some SMTP providers)

extension=curl

2. Configure frontend

• In AjaxForm.js:

  const RECAPTCHA_SITE_KEY = 'YOUR_RECAPTCHA_SITE_KEY';

• In index.html:

  <script src="https://www.google.com/recaptcha/api.js?render=YOUR_RECAPTCHA_SITE_KEY"></script>

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🔧 Customization

• Validation messages → edit in index.html

• Confirmation email → customize email_template.php (logo, branding, text)

• Rate limiting → edit in AjaxForm.php:

  const MAX_ATTEMPTS = 5;
  const RATE_LIMIT_DURATION = 3600; // in seconds

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🤝 Contributing

Issues and PRs are welcome !

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👨‍💻 Author

Developed by Raspgot — contact@raspgot.fr

If you find this project useful, please ⭐ star the repository !

Dependencies

• PHPMailer
• Bootstrap