README

Server-side tracking of actions (e.g. page views) in Matomo using the Matomo Tracking HTTP API.

Features

• Framework-agnostic, uses PSR-7: HTTP message interfaces, PSR-17: HTTP Factories and PSR-18: HTTP Client
• Container/dependency injection friendly
• Track page views from server requests
• Track actions without requests
• Track visitor IP address (requires Matomo Auth Token)
• Attributes for tracking of Matomo Site Id, URL, etc.
• Add custom attributes

Privacy by design

• Visitor IDs are random
• No cookies are set or forwarded
• Action attributes are sent to Matomo via POST to prevent them from showing up in access logs (thus no Log Analytics)
• Respects Do Not Track
• Respects Global Privacy Control

Installation

composer require pagemachine/matomo-tracking

Usage

Actions can be tracked with the Matomo class. Make sure you have implementations for UriFactoryInterface, RequestFactoryInterface, ClientInterface and LoggerInterface.

You should configure the HTTP client with a sane timeout. This ensures pages load quickly in case a Matomo instance is not responding. Tracking will be skipped in this case.

In case of most frameworks the dependency injection container will cover most dependencies and you only need to manually configure the URL of your Matomo instance. E.g. with Symfony:

services:
  Pagemachine\MatomoTracking\Matomo:
    arguments:
      $uri: '%env(MATOMO_URL)%'

Then have Matomo injected:

use Pagemachine\MatomoTracking\Matomo;

final class Example
{
    public function __construct(
        private readonly Matomo $matomo,
    ) {}

    public function someAction(): void
    {
        $this->matomo->track(...);
    }
}

Alternatively use standalone solutions like guzzlehttp/guzzle, guzzlehttp/psr7 and some useful logger or the PSR NullLogger:

use GuzzleHttp\Client;
use GuzzleHttp\Psr7\HttpFactory;
use GuzzleHttp\RequestOptions;
use Pagemachine\MatomoTracking\Matomo;
use Pagemachine\MatomoTracking\Tracking\ActionFactory;
use Pagemachine\MatomoTracking\Tracking\ActionTracker;
use Psr\Log\NullLogger;

$matomoUrl = 'https://...';
$httpFactory = new HttpFactory();

$matomo = new Matomo(
    $matomoUrl,
    new ActionFactory(),
    new ActionTracker(
        $httpFactory,
        $httpFactory,
        new Client([
            RequestOptions::TIMEOUT => 3,
        ]),
        new NullLogger(),
    ),
    new NullLogger(),
);

$this->matomo->track(...);

Server requests

A PSR-7 ServerRequestInterface can directly be tracked as page view:

use Pagemachine\MatomoTracking\Matomo;
use Pagemachine\MatomoTracking\Tracking\Attributes\ActionName;
use Pagemachine\MatomoTracking\Tracking\Attributes\SiteId;
use Psr\Http\Message\ServerRequestInterface;

final class Example
{
    public function __construct(
        private readonly Matomo $matomo,
    ) {}

    public function someAction(ServerRequestInterface $request): void
    {
        // Url attribute is determined from request
        $request = $request->withAttribute('matomo.attributes', [
            new SiteId(1),
            new ActionName('Some action'),
        ]));

        $this->matomo->track($request);
    }
}

As shown the custom matomo.attributes request attribute can be set for tracking attributes.

By default URLs (current, referrer) and client info (user agent, language) are determined from the server request.

Actions

Aside from PSR-7 server requests, actions not directly related to a request can also be tracked. Use the ActionFactoryInterface (frameworks) or the ActionFactory (standalone) to track an action with attributes:

use Pagemachine\MatomoTracking\Matomo;
use Pagemachine\MatomoTracking\Tracking\Attributes\ActionName;
use Pagemachine\MatomoTracking\Tracking\Attributes\SiteId;
use Pagemachine\MatomoTracking\Tracking\Attributes\Url;

final class Example
{
    public function __construct(
        private readonly Matomo $matomo,
        private readonly ActionFactoryInterface $actionFactory,
    ) {}

    public function someAction(): void
    {
        $action = $this->actionFactory->createAction()
            ->withAttribute(new SiteId(1))
            ->withAttribute(new Url('https://example.org/demo'))
            ->withAttribute(new ActionName('Demo Page'));

        $this->matomo->track($action);
    }
}

You can also create an action from a PSR-7 ServerRequestInterface if desired:

use Pagemachine\MatomoTracking\Matomo;
use Psr\Http\Message\ServerRequestInterface;

final class Example
{
    public function __construct(
        private readonly Matomo $matomo,
        private readonly ActionFactoryInterface $actionFactory,
    ) {}

    public function someAction(ServerRequestInterface $request): void
    {
        // Url attribute is determined from request
        $action = $this->actionFactory->createActionFromRequest($request)
            ->withAttribute(new ActionName('Demo Page'));

        $this->matomo->track($action);
    }
}

Action factories

If there are additional attributes which should be added to actions by default, you can add a custom ActionFactoryInterface. This should wrap or decorate the default ActionFactory to ensure all default attributes are added:

use Pagemachine\MatomoTracking\Tracking\ActionFactoryInterface;
use Pagemachine\MatomoTracking\Tracking\ActionInterface;
use Psr\Http\Message\ServerRequestInterface;

final class ExampleActionFactory implements ActionFactoryInterface
{
    public function __construct(
        private readonly ActionFactoryInterface $decorated,
    ) {}

    public function createAction(): ActionInterface
    {
        $action = $this->decorated->createAction()
            ->withAttribute(...);

        return $action;
    }

    public function createActionFromRequest(ServerRequestInterface $serverRequest): ActionInterface
    {
        $action = $this->decorated->createActionFromRequest($serverRequest)
            ->withAttribute(...);

        return $action;
    }
}

This pattern can be used to add the mandatory SiteId attribute to all tracked actions.

Attributes

Attributes contain tracking values and cover one or more of the Matomo Tracking HTTP API parameters:

(Attributes marked with * are added internally and always sent.)

You must at least add a SiteId attribute for tracking in Matomo. All other attributes may be used on demand.

Some attributes like VisitorIpAddress require an auth token which must be provided with the AuthToken attribute. See Matomo Tracking HTTP API: Other parameters for details when an auth token is required.

Custom attributes

Custom attributes can be added by implementing the AttributeInterface:

use Pagemachine\MatomoTracking\Tracking\AttributeInterface;

final class ExampleDimension implements AttributeInterface
{
    public function __construct(private string $example) {}

    public function toParameters(): iterable
    {
        return ['dimension1' => $this->example];
    }
}

The keys of the iterable (array, \Generator, etc.) returned by toParameters() must be parameters of the Matomo Tracking HTTP API.