Comments on: Alternatives to CAPTCHA Image Verification http://www.fullondesign.co.uk/coding/php/513-alternatives-to-captcha-image-verification.htm Design & Web Technologies Sat, 31 Jul 2010 10:22:06 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Kyle Duncan http://www.fullondesign.co.uk/coding/php/513-alternatives-to-captcha-image-verification.htm/comment-page-1#comment-1862 Kyle Duncan Wed, 22 Jul 2009 13:41:52 +0000 http://www.fullondesign.co.uk/?p=513#comment-1862 Hi, thanks for the great tips here firstly! i want to use the response timer solution which seems the best to me, but once i did in my form action ("cgi-bin/enquiryform.pl") the form submits anyway and ignores the php. it works fine if i remove the action, though. is there any way i can make it work to stop the form action taking place if it's filled out too soon (i assume this is how it's meant to work and i' just missing something!!) thanks Hi, thanks for the great tips here firstly! i want to use the response timer solution which seems the best to me, but once i did in my form action (“cgi-bin/enquiryform.pl”) the form submits anyway and ignores the php. it works fine if i remove the action, though. is there any way i can make it work to stop the form action taking place if it’s filled out too soon (i assume this is how it’s meant to work and i’ just missing something!!)

thanks

]]> By: Abel Mohler http://www.fullondesign.co.uk/coding/php/513-alternatives-to-captcha-image-verification.htm/comment-page-1#comment-205 Abel Mohler Thu, 26 Mar 2009 02:02:05 +0000 http://www.fullondesign.co.uk/?p=513#comment-205 I use a combination of the "Response Timer" and the "JavaScript extra". Generate a timestamp on the server, put it into a cookie, but hashed with a secret salt, then place the timestamp into a hidden field via JavaScript. When the form is submitted, re-hash the recorded timestamp, and if it matches the cookie, magic! human! I use a combination of the “Response Timer” and the “JavaScript extra”. Generate a timestamp on the server, put it into a cookie, but hashed with a secret salt, then place the timestamp into a hidden field via JavaScript. When the form is submitted, re-hash the recorded timestamp, and if it matches the cookie, magic! human!

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