Beschreibung
Adds a „Custom Captcha“ field to the Fluent Forms editor with three challenge types:
- Image captcha — a 6-character code rendered as an image, with customizable text color and a transparent background by default so it blends with any form design
- Math captcha — a simple arithmetic question rendered as an image
- Question and answer — you define the question (field label) and the expected answer
Challenges are single-use and expire after 15 minutes. Answers are stored server-side via WordPress transients — nothing is exposed to the browser except the image itself. Visitors get a refresh button to request a new challenge, and the captcha automatically renews after each AJAX submission, so it also works on cached pages.
On top of the captcha you get two extra spam defenses:
- Time-trap (optional, off by default) — submissions completed faster than a human possibly could are rejected via an HMAC-signed timestamp; enable it and set the minimum submit time per field
- Disposable email blocking (optional, on by default) — rejects submissions where an email field uses a temporary/disposable email domain like mailinator.com or yopmail.com; extend the list with the
ffc_captcha_blocked_email_domainsfilter
Everything runs on your own server: no external captcha service, no API keys, no cookies, no visitor data sent anywhere.
Requirements
Fluent Forms is required. The PHP GD extension is recommended for image rendering (with a plain-text fallback when unavailable).
How To Use
- Activate the plugin
- Edit a form in Fluent Forms — a new „Custom Captcha“ field appears in the editor
- Drop it into your form and pick the captcha type in the field settings
- Optionally set the text color, background color (RGB values like „68, 68, 68“, or „transparent“) and error message
Installation
- Login to your WordPress Admin Area
- Go to Plugins -> Add New
- Type „Custom Captcha Field for Fluent Forms“ into the Search and hit Enter
- Find this plugin and click „Install Now“
- Activate the plugin
- Add the Custom Captcha field to your form in the Fluent Forms editor
Rezensionen
Mitwirkende und Entwickler
„Custom Captcha Field for Fluent Forms“ ist Open-Source-Software. Folgende Menschen haben an diesem Plugin mitgewirkt:
Mitwirkende
Übersetze „Custom Captcha Field for Fluent Forms“ in deine Sprache.
Interessiert an der Entwicklung?
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Änderungsprotokoll
2.0.0
- Security: challenge answers are no longer stored in a publicly readable file; each challenge is now a single-use, expiring token stored via WordPress transients
- Security: removed eval() from math captcha validation
- Added: transparent captcha background (new default) and customizable text/background colors
- Added: refresh button on the captcha image
- Added: captcha auto-renews after AJAX submissions and on page load, so it works with page caching
- Added: optional time-trap — reject submissions completed faster than a configurable minimum (default 3 seconds) or carrying a tampered timestamp
- Added: optional disposable email blocking for the whole form (filterable via ffc_captcha_blocked_email_domains)
- Fixed: compatible with Fluent Forms 5+ hook names (validation no longer relies on a deprecated hook)
- Fixed: math challenges no longer produce negative answers
- Fixed: text captcha comparison is now trimmed and case-insensitive
- Fixed: field renamed from „Recaptcha“ to „Custom Captcha“ (this plugin is not related to Google reCAPTCHA)
1.0.0
- Initial release