Somebody can just help me to write Captcha Code with the code proper COMMENTED. Did some try to look for Code for PHP Captcha and found some codes but i am unable to understand any of them as the code was haphazard with non existent comments on the Captcha Code. Another reason want to write my own captcha is that i want it to be highly customized so that i can change it according to my requirements as for this particular i need highly customized Captcha.
Also tell me what version of PHP this catcha code will work on and what libraries of PHP should be available at Web Server so that this can run and the code can work.