> ## Documentation Index
> Fetch the complete documentation index at: https://docs.paubox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Paubox PHP SDK

> Send HIPAA-compliant email and submit Paubox Forms from PHP applications using the official Paubox PHP SDK.

The Paubox PHP SDK is the official PHP client library for the [Paubox Email API](/email-api) and [Paubox Forms](/forms). Install it with Composer and send encrypted, HIPAA-compliant email with a few lines of PHP.

```bash theme={null}
composer require paubox/paubox-php
```

## What you can do

* Send encrypted, HIPAA-compliant email to one or more recipients
* Add CC, BCC, attachments, and HTML or plain-text content
* Track delivery status and engagement per recipient
* Retrieve Paubox Form schemas and submit form responses with file attachments

## Requirements

* PHP (any recent version)
* [Composer](https://getcomposer.org)
* Dependencies installed automatically: `nategood/httpful` and `vlucas/phpdotenv`

## Get started

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/php-sdk/quickstart">
    Install, configure credentials, and send your first email in minutes.
  </Card>

  <Card title="Authentication" icon="key" href="/php-sdk/authentication">
    Set up your API key and username via a .env file.
  </Card>

  <Card title="Email client" icon="envelope" href="/php-sdk/email-client">
    Full reference for sending email and checking delivery status.
  </Card>

  <Card title="Forms client" icon="file-lines" href="/php-sdk/forms-client">
    Retrieve form schemas and submit responses.
  </Card>
</CardGroup>

## Version note

The current stable release (v1) covers sending email and the Forms API. A v2 beta on the `sdk-generation/v2.0.0-beta` branch adds bulk sending and dynamic templates. This documentation covers v1.