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WordPress Custom Plugin

A lightweight WordPress plugin that injects dynamic product document sections into WooCommerce product pages using hooks, ACF, and taxonomy-aware logic. Designed to replace theme snippets with a maintainable plugin architecture.

by Carly Lau · github.com/carlylau-marketing/wordpress-custom-plugin · website

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Install

No release zip yet. The repository archive installs, but the folder name will carry the branch suffix and updates will not flow:

wp plugin install https://github.com/carlylau-marketing/wordpress-custom-plugin/archive/refs/heads/main.zip
Readme github.com/carlylau-marketing/wordpress-custom-plugin ↗

WooCommerce Product Documents Enhancer

A lightweight WordPress plugin that injects dynamic product document sections into WooCommerce product pages using hooks, ACF, and taxonomy-aware logic. Designed to replace theme snippets with a maintainable plugin architecture.

Version: 1.1.0
License: GPL-2.0+
Platform: WordPress / WooCommerce
Dependencies: WooCommerce, Advanced Custom Fields (ACF)

Overview

This plugin adds a custom Downloads tab to WooCommerce product pages, displaying:

  • Product certification documents
  • Light photometric files (IES / LDT)

The solution is implemented as a standalone plugin to ensure stability across theme updates and to avoid fragile theme-based PHP snippets.

Key Features

  • WooCommerce-native product tab integration
  • Automatic certificate discovery via product taxonomy mapping
  • Photometric file support using ACF Post Object relationships
  • Shared photometrics across multiple products
  • External PDF redirect handling
  • Theme-agnostic architecture (tested with Porto)

Architecture Highlights

  • No shortcodes
  • No page builder dependency
  • Pure WooCommerce hooks
  • Safe execution order
  • Update-resistant plugin design

The project evolved from theme snippets into a structured plugin after theme updates removed custom PHP logic, a real-world refactor scenario.

ACF Field Configuration

Light Photometrics (Custom Post Type)

Field Name Type Notes
related_product Post Object (multiple) Links photometrics to products
light_photometrics_ies URL Google Drive Share Links (unsupported file type by WordPress)
light_photometrics_ldt URL Google Drive Share Links (unsupported file type by WordPress)

Installation

  1. Upload plugin to:
     wp-content/plugins
  2. Activate via WordPress Admin
  3. Ensure WooCommerce & ACF are active

Version History

v1.1.0

  • Removed shortcode dependency
  • Stabilised WooCommerce tab rendering
  • Fixed execution-order related fatal errors
  • Production-ready plugin architecture

v1.0.0

  • Initial extraction from theme snippets
  • Certificates + photometrics table rendering
  • PDF redirect handling

Notes for Reviewers

This plugin demonstrates:

  • Practical WordPress plugin architecture
  • Debugging of fatal errors caused by execution order
  • Refactoring from theme-level code to a portable solution
  • Real-world WooCommerce + ACF integration