What is Turing Captcha

Unlike all the captcha systems that you have used so far Turing Captcha is completely independent and free.

In addition to the usual 'retype' type captcha, there are too many question combinations by asking logical or mathematical questions. Therefore it cannot be manipulated by intelligent systems.

How does it look

Why Turing Captcha

Turing captcha is completely free.
All implementations and system of Turing captcha can be hosted on your server so you don't need any services of zoogle, hoogle or soogle.
You can add more font types. this may make it impossible to manipulate the system
mathematical and cultural questions are written in captcha style and humanistic answers are asked. Moreover, you can add your own questions.

Working With Example Page of Turing Captcha

You can add Turing Captcha to your project with only this one line of code !
For getting started, you should get clone.zip of project and open example.html

if you looking for a ready-running example, look at : http://turing-captcha.umitaksoylu.com

How can i implement Turing Captcha in my project ?

Step 1: Copy Turingcaptcha folder in your project's directory.

Step 2 : Copy this iframe code and paste in your code

Step 3: in backend (php side); if value of
$_SESSION["XCAPTCHA_QUESTION"] is equals to TRUE,
this means user has verified himself as human.

How to add or remove fonts ?

Attention : xx is supports only .otf font types for now.

if you want use another font format, you must work on drawcaptcha.php

Step 1: Copy your .otf font file into turingcaptcha/fonts directory

Step 2: Edit settings.php,
add your new font's name without file extension into
$FONTS = array();

How to add humanistic-logic questions ?

Edit settings.php add your new question answer duo into

$TURING_QUESTIONS = array();

example :

Q: Capital city of Turkey
A : Ankara
Code :
$TURING_QUESTIONS = array(...,Capital city of Turkey" => "Ankara");

What should i know more ?

Turing Captcha supports three types of questions.

Math Questions : system asks simple mathematical questions to users
Turing Questions : system asks humanistic - cultural questions to users

example;
q:Capital city of Turkey
a:Ankara

Captcha Questions : system asks regular captcha retype questions to users.

you can enable or disable easily any of these question types with updating value of

$IS_MATH_QUESTIONS_ENABLED
$IS_TURING_QUESTIONS_ENABLED
IS_CAPTCHA_QUESTIONS_ENABLED

Also you can adjust difficulty level of math questions with updating
value of $MATH_QUESTIONS_DIFFICULTY variable.

1 : Easy
2: Medium
3: Humans maybe can't solve

Aksoylu/Turing-Captcha