Captcha
These checks validate a captcha string generated by an extension of you choice. Please have a look at How to set up spam protection for more details.
captcha
Checks if a field value equals the generated captcha string of the extension captcha.
srFreecap
Checks if a field value equals the generated captcha string of the extension sr_freecap.
jmRecaptcha
Checks if a field value equals the generated captcha string of the extension jm_recaptcha.
mathGuard
Checks if a field value equals the result of the generated question of MathGuard.
wtCalculatingCaptcha
Checks if a field value equals the generated captcha string of the extension wt_calculating_captcha.