README

Package: djdmg/transparent-pixel-bundle
A tiny Symfony bundle that adds a 1×1 transparent tracking pixel for pages and emails. Each hit is stored with rich request details (IP, User-Agent, OS, browser, device, mobile/bot flags, headers, query params, cookies, referer, method, timestamp).

Requirements

PHP 8.2+
Symfony 7.x (framework-bundle, twig-bundle)
Doctrine ORM 3.x + DoctrineBundle

Install

composer require djdmg/transparent-pixel-bundle

If you allow contrib recipes (recommended):

composer config extra.symfony.allow-contrib true

If Flex recipe isn’t available, wire manually:

<?php // config/bundles.php
return [
    Djdmg\TransparentPixelBundle\TransparentPixelBundle::class => ['all' => true],
];

# config/routes/transparent_pixel.yaml
transparent_pixel_bundle:
  resource: '@TransparentPixelBundle/Controller/'
  type: attribute

Database

Generate and run migrations in your app:

php bin/console doctrine:migrations:diff
php bin/console doctrine:migrations:migrate -n

Tables created: tp_pixel, tp_pixel_hit.

Usage

1) Create or fetch a Pixel

use Djdmg\TransparentPixelBundle\Service\PixelManager;

public function show(PixelManager $pixels)
{
    // Creates on first call, returns existing afterwards
    $pixel = $pixels->ensurePixel('newsletter-aug-2025', ['campaign' => 'summer25']);

    return $this->render('page.html.twig', ['pixel' => $pixel]);
}

2) Render in Twig (page)

{# Adds ?uid=… to the URL and logs it under "query" JSON #}
{{ transparent_pixel_tag(pixel, { uid: app.user ? app.user.id : 'guest' }) }}

Or just the URL:

<img src="{{ transparent_pixel_url(pixel, { source: 'landing' }) }}" width="1" height="1" style="display:none" alt="" loading="eager">

3) Use in emails (Symfony Mailer)

use Symfony\Bridge\Twig\Mime\TemplatedEmail;

$pixel = $pixels->ensurePixel('reset-password');

$email = (new TemplatedEmail())
    ->to($user->getEmail())
    ->subject('Reset your password')
    ->htmlTemplate('emails/reset.html.twig')
    ->context([
        'pixel' => $pixel,
        'uid'   => (string)($user->getId() ?? 'guest'),
    ]);

$this->mailer->send($email);

{# templates/emails/reset.html.twig #}
{{ transparent_pixel_tag(pixel, { uid: uid }) }}

Tip (CLI/cron/workers): set a base URL if you generate links outside HTTP requests:

# config/packages/framework.yaml
framework:
  router:
    default_uri: 'https://app.example.com'

4) Read access details (code)

// All hits (limit 500) or only for a specific pixel
$all      = $pixels->getAccessDetails(null, 500);
$perPixel = $pixels->getAccessDetails($pixel, 200);

Each item includes:

[
  'at' => '2025-08-15T10:00:23+00:00',
  'ip' => '203.0.113.10',
  'os' => 'iOS 17',
  'browser' => 'Mobile Safari 17.4',
  'device' => 'iPhone',
  'isMobile' => true,
  'isBot' => false,
  'method' => 'GET',
  'referer' => 'https://example.com/page',
  'headers' => [...],
  'query' => ['uid' => '123'],
  'cookies' => [...],
  'ua' => 'Mozilla/5.0 (...)',
  'token' => 'ab12…',
  'pixel' => ['id' => 1, 'name' => 'newsletter-aug-2025'],
]

Production notes

No-cache headers ensure every view triggers a hit.
Trusted proxies for real client IPs:

framework:
  trusted_proxies: '%env(TRUSTED_PROXIES)%'
  trusted_headers: ['x-forwarded-for','x-forwarded-proto','x-forwarded-host','x-forwarded-port']

# .env
TRUSTED_PROXIES=127.0.0.1,REMOTE_ADDR

Privacy/GDPR: inform users, consider anonymizing IPs (e.g., truncate /24) and add a retention policy.

Troubleshooting

Routes not found → ensure routes are imported with @TransparentPixelBundle/Controller/.
Relative URLs in emails → set framework.router.default_uri.
No tables → run migrations (diff + migrate).

djdmg / transparent-pixel-bundle

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