I have created a contact form using php and ajax.can anyone plz help me to add an image verification here : http://galtech.org/seo/ Is session required for CAPTA ?
can u plz explain its reason ? So inorder to implement a Captcha I need to start a session first on the captcha display page ? and check whether the session is set in the validation page ? How can I validate a captcha ?
Normally captcha scripts start the sessions themselves. They need session to store the captcha value. Captcha compares the value in session with the user entered value.