I have php 4 installed and I am using recaptcha for captcha, But its not so user friendly, So i am looking for any captcha script that is user friendly, easy to implement and must be compatible with php 4.3.x.
OR Is there any way to customize the recaptcha so that it becomes user friendly and not as complicated as now. and the characters length should be 3 or 4 max. I have searched many captcha's they were up to my requirements but there are not compatible with php4.