SEF e‑Invoice (Serbia) — PHP Integration

Production‑grade SEF e‑invoice integration (Serbia) with:

• UBL 2.1 XML builder aligned to SEF 3.14.0 profile checks
• Queue + background worker to avoid timeouts
• Retries + dead‑letter handling
• Attachments support
• .env config + JSON logging

Author: Boško Radivojević — BRadivojevic

Setup

1. composer install
2. Copy .env.example → .env
3. Serve public/ and POST to /public/submit-invoice.php
4. Run workers/send_invoice_worker.php to process the queue