README

A PHP client library for the Lettr email API.

Requirements

• PHP 8.4 or higher
• Guzzle HTTP client

Installation

composer require lettr/lettr-php

Usage

Basic Usage

use Lettr\Lettr;
use Lettr\Dto\SendEmailData;

// Create client with your API key
$lettr = Lettr::client('your-api-key');

// Send an email using DTO
$email = new SendEmailData(
    from: 'sender@example.com',
    to: ['recipient@example.com'],
    subject: 'Hello from Lettr',
    text: 'Plain text body',
    html: '<p>HTML body</p>',
);

$response = $lettr->emails()->send($email);

echo $response->id; // The email ID

Using Array Syntax

You can also create the DTO from an array:

use Lettr\Lettr;
use Lettr\Dto\SendEmailData;

$lettr = Lettr::client('your-api-key');

$email = SendEmailData::from([
    'from' => 'sender@example.com',
    'to' => ['recipient@example.com'],
    'subject' => 'Hello from Lettr',
    'text' => 'Plain text body',
    'html' => '<p>HTML body</p>',
]);

$response = $lettr->emails()->send($email);

Property Access

You can access the emails service via method or property:

// Via method
$response = $lettr->emails()->send($email);

// Via property
$response = $lettr->emails->send($email);

Custom Base URL

If you need to use a different API endpoint:

$lettr = Lettr::client('your-api-key', 'https://custom-api.example.com');

API Reference

SendEmailData

EmailResponse

Error Handling

The client throws exceptions for API errors:

use Lettr\Lettr;
use Lettr\Exceptions\ApiException;
use Lettr\Exceptions\TransporterException;

try {
    $response = $lettr->emails()->send($email);
} catch (ApiException $e) {
    // API returned an error response
    echo $e->getMessage();
} catch (TransporterException $e) {
    // Network or transport error
    echo $e->getMessage();
}

Development

Install Dependencies

composer install

Code Style

This project uses Laravel Pint for code style:

composer lint

Static Analysis

This project uses PHPStan at level 8:

composer analyse

Testing

This project uses Pest for testing:

composer test

License

MIT License. See LICENSE for more information.