Developer Guide

Start extending Elzo Forms with PHP hooks, filters, templates, modules, automation APIs, and JavaScript events.

Display Elzo Forms in content or templates.

Override Elzo Forms templates from a theme or child theme.

Important PHP hooks and filters available in Elzo Forms.

Customize validation, spam detection, saved submissions, and AJAX responses.

Customize validation and how empty field values are detected.

Customize submission email settings and email field output.

Extend field types, text subtypes, field tabs, and width options.

Section: Developer Guide Topic: Fields Applies to: Elzo Forms Free and Pro Scope: PHP, frontend rendering, admin field settings, validation, sanitization This guide shows how to create a custom Elzo Forms field type. You will build a practical Star Rating field that appears in the form builder, renders on the frontend, saves a submitted rating, […]

Section: Developer Guide Topic: Fields Applies to: Elzo Forms Free and Pro Scope: PHP field classes, field configuration, admin save normalization, frontend rendering, validation, sanitization, JSON form data This reference documents the \ElzoForms\Field\Field base class and the data contract used by Elzo Forms field types. If you are building your first custom field, start with […]

Register and customize Elzo Forms modules.

Use front-end JavaScript events to customize validation, submission, AJAX, alerts, modals, success, and errors.

Use admin JavaScript events when extending the form builder UI.

Extend Elzo Forms PRO automations with custom actions, conditions, hooks, context patches, and logs.

Register custom PRO automation actions with ActionInterface.

Register custom PRO automation condition types.

Run custom PHP before and after automation rules and actions.

Use merge tags in PRO automation text settings.

Customize PRO automation logs and redact sensitive details.

Developer notes for building reliable webhook integrations.

Keep custom Elzo Forms integrations safe.