NFE.io PHP SDK Integration Guide

This skill enables correct, production-ready code with the NFE.io PHP SDK for Brazilian electronic fiscal documents: NFS-e (service invoices), NF-e (product invoices), NFC-e (consumer invoices), CT-e (transport), plus CNPJ/CPF/CEP lookups and tax calculation.

PHP is not Node. The SDK has conceptual 1:1 parity with the Node SDK (nfe-io) but its idioms differ in ways that break a naive port. The most important: there is no createAndWait() — you poll manually. See Critical Pitfalls.

Package & Import

Composer package: nfe/nfe (the GitHub repo is nfe/client-php; the Packagist name is nfe/nfe).

composer require nfe/nfe

use Nfe\Client;