Captcha plugins

Parameters of every plugin in the captcha group, from each plugin's manifest. Set them under Extensions > Plugins in the administrator interface.

Image CAPTCHA (plg_captcha_image)

Generates an image based CAPTCHA

Basic

Parameter	Label	Type	Default	Description
bgColor	Background Color	text	#ffffff	Enter color (6 letter hex value)
textColor	Text Color	text	#2c8007	Enter color (6 letter hex value)
imageFunction	Select Image Function	list	Adv (Distorted letters)	Select wether you want to show distorted letters or plane letters. Options: Plain Plain letters, Adv Distorted letters.

Captcha - Math (plg_captcha_math)

Generates a math based CAPTCHA

Basic

Parameter	Label	Type	Default	Description
lower	Random integer Min value	text	0	Minimum integer value to generate a random number from
upper	Random integer Max value	text	10	Maximum integer value to generate a random number from

Captcha - ReCaptcha (plg_captcha_recaptcha)

This CAPTCHA plugin uses the reCAPTCHA service to prevent spammers while it helps to digitize books, newspapers and old radio shows. To get a public and private key for your domain, go to http://www.google.com/recaptcha. To use this for new account registration, go to Options in the User Manager and select Captcha - reCaptcha as the Captcha.

Basic

Parameter	Label	Type	Default	Description
public	Public Key	text	—	ReCaptcha Public Key. Visit www.google.com/recaptcha
private	Private Key	text	—	ReCaptcha Private Key Visit www.google.com/recaptcha
theme	Theme	list	light (Light)	The color theme of the CAPTCHA widget. Options: light Light, dark Dark.
type	Type	list	image (Image)	The type of CAPTCHA to serve. Options: image Image, audio Audio.
language	Language Code	text	en	Language code used when rendering reCAPTCHA. See https://developers.google.com/recaptcha/docs/language.