Step by Step Guide to Building a Kajabi API Integration in PHP

Introduction

Hey there, fellow developer! Ready to dive into the world of Kajabi API integration? You're in for a treat. Kajabi's API is a powerful tool that'll let you tap into their platform's functionality, giving you the ability to manage courses, users, and subscriptions programmatically. In this guide, we'll walk through the process of building a solid integration using PHP. Let's get our hands dirty!

Prerequisites

Before we jump in, make sure you've got:

• A PHP environment up and running (PHP 7.4+ recommended)
• Composer installed (trust me, it'll make your life easier)
• A Kajabi account with API credentials (you can't cook without ingredients, right?)

Setting up the project

First things first, let's get our project structure in place:

mkdir kajabi-integration
cd kajabi-integration
composer init

Now, let's add the dependencies we'll need:

composer require guzzlehttp/guzzle

Authentication

Alright, time to get cozy with Kajabi's OAuth 2.0 flow. Head over to your Kajabi dashboard and grab your API keys. Then, let's implement the authentication:

<?php

use GuzzleHttp\Client;

$client = new Client([
    'base_uri' => 'https://kajabi.com/api/v1/',
    'headers' => [
        'Authorization' => 'Bearer YOUR_ACCESS_TOKEN',
        'Accept' => 'application/json',
    ],
]);

Making API requests

Now that we're authenticated, let's make some requests! Here's a basic structure:

try {
    $response = $client->request('GET', 'courses');
    $courses = json_decode($response->getBody(), true);
} catch (\Exception $e) {
    // Handle errors
}

Core API functionalities

Let's explore some key functionalities:

Retrieving courses

$response = $client->request('GET', 'courses');
$courses = json_decode($response->getBody(), true);

Managing users

$response = $client->request('POST', 'users', [
    'json' => [
        'email' => '[email protected]',
        'name' => 'New User',
    ],
]);

Handling subscriptions

$response = $client->request('POST', 'subscriptions', [
    'json' => [
        'user_id' => 123,
        'offer_id' => 456,
    ],
]);

Webhooks integration

Kajabi's webhooks are super useful for real-time updates. Set up an endpoint in your app:

// webhook.php
<?php

$payload = file_get_contents('php://input');
$event = json_decode($payload, true);

// Process the event
switch ($event['type']) {
    case 'user.created':
        // Handle new user
        break;
    // Add more cases as needed
}

Error handling and logging

Don't forget to implement robust error handling:

try {
    // API request here
} catch (\GuzzleHttp\Exception\ClientException $e) {
    $errorResponse = $e->getResponse();
    $errorMessage = json_decode($errorResponse->getBody(), true);
    // Log the error
    error_log("Kajabi API error: " . json_encode($errorMessage));
} catch (\Exception $e) {
    // Handle other exceptions
}

Testing the integration

Time to put our code through its paces:

// tests/KajabiIntegrationTest.php
<?php

use PHPUnit\Framework\TestCase;

class KajabiIntegrationTest extends TestCase
{
    public function testGetCourses()
    {
        // Implement your test
    }

    // Add more tests
}

Best practices and optimization

Remember to respect Kajabi's rate limits and implement caching where it makes sense. Your future self will thank you!

use Symfony\Component\Cache\Adapter\FilesystemAdapter;

$cache = new FilesystemAdapter();

$cachedCourses = $cache->getItem('courses');
if (!$cachedCourses->isHit()) {
    $courses = // Fetch courses from API
    $cachedCourses->set($courses);
    $cache->save($cachedCourses);
}

Conclusion

And there you have it! You've just built a solid Kajabi API integration in PHP. Remember, this is just the beginning – there's so much more you can do with the API. Keep exploring, keep coding, and most importantly, have fun with it!

For more details, always refer to the official Kajabi API documentation. Happy coding!