E-Invoice Collector (WordPress Plugin)

Self-contained WordPress plugin for collecting guest e-invoice details and processing them through a lightweight staff portal. Does not touch your theme or any existing page.

• Single-page guest form: Booking Confirmation Number + invoice recipient details (Individual / Company), TIN, contact, and address.
• Own database table, own REST route, own admin screens.
• Staff portal (/e-invoice-portal/) — process requests without a WordPress login.
• Optional email notifications (configurable).

Install

1. Copy einvoice.php into wp-content/plugins/einvoice/ (or zip and upload via Plugins → Add New → Upload Plugin).
2. Activate E-Invoice Collector. Activation creates the DB tables and generates the portal HMAC secret automatically.
3. Add the shortcode [bhg_einvoice] to any page to render the guest form.

Configure

Edit the placeholder constants at the top of einvoice.php before going live:

Constant	Purpose
BHG_EINV_BHG_EMAIL	Your e-invoice inbox (internal notifications)
BHG_EINV_BHG_CC	Optional internal CC (comma-separated)
BHG_EINV_FROM	From: header for outgoing mail
BHG_EINV_NOTI_SECRET	Shared secret for the notifier/bounce REST routes (set EINV_NOTI_SECRET env, or edit here)

Property names, ID types, states and countries live in the REFERENCE DATA block — adjust to your business.

Notes

• No third-party CDNs, no external credentials, no deploy tooling bundled.
• Portal password + token lifetimes are set under Settings → E-Invoice.