SP PHP Email Handler

A PHP package for handling contact form submissions. Features include:

• Email delivery: Sends messages to both the recipient mailbox and confirmation emails to the sender.
• Captcha verification: Supports Google reCAPTCHA, Cloudflare Turnstile, or custom captchas.
• CSRF protection: Validates requests using anti-CSRF tokens.
• JSON error responses: Provides standardized error messages with appropriate HTTP status codes.

Requirements

• PHP 7.4 or higher
• A configured config.php file with required variables (see "Configuration" below)

All required libraries are bundled with this package, including:

• PHPMailer for email sending
• spencer14420\SpAntiCsrf for CSRF protection

Installation

1. Install the package via Composer:

   composer require spencer14420/sp-php-email-handler

2. Include the autoload.php file in your project:

   require_once 'vendor/autoload.php';

Usage

Initialization

use spencer14420\PhpEmailHandler\EmailHandler;

$emailHandler = new EmailHandler('/path/to/config.php');

Handling Requests

$emailHandler->handleRequest();

Example Contact Form

<form action="/path/to/email-handler.php" method="POST">
  <input type="hidden" name="csrfToken" value="your-csrf-token" />
  <input type="email" name="email" placeholder="Your Email" required />
  <input type="text" name="name" placeholder="Your Name" required />
  <textarea name="message" placeholder="Your Message" required></textarea>
  <button type="submit">Send</button>
</form>

Example email-handler.php

require_once 'vendor/autoload.php';

use spencer14420\PhpEmailHandler\EmailHandler;

try {
    $emailHandler = new EmailHandler('/path/to/config.php');
    $emailHandler->handleRequest();
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['status' => 'error', 'message' => $e->getMessage()]);
}

Configuration

Create a config.php file with the following variables:

#### REQUIRED ####

$mailboxEmail = '[email protected]';
// The email address where messages from the contact form will be sent.
// This must be provided and must be a valid email address.


#### OPTIONAL ####

$fromEmail = '[email protected]';
// The email address used as the "From" address in outgoing emails.
// If not provided, it defaults to the `$mailboxEmail`.

$replyToEmail = '[email protected]';
// The email address used as the "Reply-To" address in outgoing emails.
// If not provided, it defaults to the `$mailboxEmail`.

$siteDomain = 'example.com';
// The domain name of the website (e.g., example.com).
// If not provided, it defaults to the server's host name (`$_SERVER['HTTP_HOST']`).

$siteName = 'Example';
// The name of the website, used in email subjects and greetings.
// If not provided, it is derived from `$siteDomain` (e.g., "Example" for "example.com").

$captchaToken = '';
// If using a CAPTCHA, this should be set to the POST variable containing the CAPTCHA token.
// If CAPTCHA is not used, leave this empty.

$captchaSecret = '';
// The secret key for verifying CAPTCHA responses, required if CAPTCHA is enabled.
// If CAPTCHA is not used, leave this empty.

$captchaVerifyURL = '';
// The URL used to verify the CAPTCHA response.
// e.g. https://www.google.com/recaptcha/api/siteverify

$checkCsrf = false;
// Set to `true` to enable CSRF protection or `false` to disable it.

$csrfToken = '';
// The CSRF token from the POST request. Required if `$checkCsrf` is set to `true`.