[RESOLVED] How can i use a captcha on my page

[bharanidharanit]

Hello sir,
I am using ASP. In register page, it want to ask for captcha code while registering. (captcha must be random)

Can anyone help me in this coding?

[si_the_geek]

Thread moved from CodeBank forum (which is for you to post your code examples, not questions)

[mendhak]

ASP or ASP.NET?

http://www.tipstricks.org/
http://www.u229.no/stuff/Captcha/

[knxrb]

Here's what I use, it's not very secure at all!

<%
     Dim strCaptcha, pChar, pCount
     pChar = "0123456789"
     pCount = Len(pChar) 
     Randomize
     For i = 1 To 5
     strNumber = Mid(pChar, 1 + Int(Rnd * pCount), 1 )
     strCaptcha = strCaptcha & strNumber
     response.write("<img src='images/numbers/" & strNumber & ".gif' />")
     Next
     session("captcha")=strCaptcha
%>

[bharanidharanit]

Here's what I use, it's not very secure at all!

<%
     Dim strCaptcha, pChar, pCount
     pChar = "0123456789"
     pCount = Len(pChar) 
     Randomize
     For i = 1 To 5
     strNumber = Mid(pChar, 1 + Int(Rnd * pCount), 1 )
     strCaptcha = strCaptcha & strNumber
     response.write("<img src='images/numbers/" & strNumber & ".gif' />")
     Next
     session("captcha")=strCaptcha
%>

With your coding i am getting output like this.

How can i fix this?

[si_the_geek]

Have you created the image files (1.gif to 9.gif), and stored them in the relevant folder?

[knxrb]

Like si_the_geek said, you need to either draw or get some number images and put them in the 'images/numbers' folder.
Here's some images if you want them:

[bharanidharanit]

But the captcha appears very easily to type by the user. Can i able to make it more difficult like captcha asked during registration in yahoomail.

[si_the_geek]

Have you looked at post #3?