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Insight Dezign

When they search, make sure they find you.

Developer Reference

This section is for developers who want to extend, customize, or integrate with the ID Payment Link Generator plugin. Whether you’re building an add-on, connecting the plugin to a CRM, or writing custom automation, this reference covers everything you need.

What’s Covered

  • Hooks & Filters — All available WordPress actions and filters you can hook into, with practical code examples for each.
  • AJAX Endpoints — A complete reference of every AJAX and admin-post endpoint the plugin registers, including parameters, authentication requirements, and response formats.
  • Database Schema — Full documentation of the three custom database tables (Pro), their column definitions, indexes, and the static CRUD classes you can use to interact with them.

Architecture Overview

The plugin follows WordPress coding standards and leverages core WordPress APIs throughout:

  • Settings API — All plugin settings are registered via register_setting() and rendered using the Settings API sections and fields pattern. Settings are stored in the idplg_settings option as a serialized associative array.
  • AJAX API — All dynamic operations (sending emails, searching customers, managing templates) use wp_ajax_ hooks with proper nonce verification and capability checks.
  • WP_List_Table — The Pro email log and customer list views extend WP_List_Table for a native WordPress admin experience with sorting, pagination, search, and bulk actions.
  • dbDelta() — Custom database tables are created and updated using WordPress’s dbDelta() function for safe, incremental schema management.

Naming Conventions

All code in this plugin is prefixed with idplg_ to prevent conflicts with other plugins or themes:

  • PHP functions and hooks: idplg_ prefix (e.g., idplg_generator_before_buttons)
  • PHP classes: IDPLG_ prefix (e.g., IDPLG_Customers)
  • JavaScript globals and AJAX actions: idplg_ prefix (e.g., idplg_send_email)
  • Database tables: {prefix}idplg_ prefix (e.g., wp_idplg_customers)
  • Options: idplg_ prefix (e.g., idplg_settings, idplg_db_version)
  • Nonces: idplg_ prefix (e.g., idplg_nonce, idplg_pro_nonce)

Requirements for Custom Development

Before building on top of this plugin, ensure you have:

  • WordPress 5.8 or higher
  • PHP 7.4 or higher
  • A local development environment with WP_DEBUG enabled
  • Familiarity with the WordPress Plugin API (add_action, add_filter)

Tip: When developing extensions, load your code on the plugins_loaded hook at a priority later than 10 to ensure the ID Payment Link Generator classes are available.