how to add a PHP verification box?

[techexpressinc]

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I have a handful of web sites with HTML forms and I am getting spam.

 

I would like to add a PHP verification box to the form.

 

Is this possible? without switching the whole form to a PHP form?

 

Thanks

Rneuman@ Scaninc.org

[Daniel0]

http://www.google.com/search?q=captcha+tutorial+php

http://recaptcha.net/plugins/php/

[techexpressinc]

That way relys on another person's server.  I rather have all the code on my hosting server.

 

Russ

[chronister]

techexpressinc

 

recaptcha is a nice service that does something else along with protecting your forms.... the google link is a google search on how to create your own captcha from scratch and host on your own server....

 

If one of those 2 replies that Daniel0 gave you don't help you, then I am not sure what we can do without creating the entire thing for you.

 

Creating a captcha is not something that can be taught in a few lines on a forum post... it is a fairly lengthy process.....

 

The basic process is this....

 

- create random string and store in session var

- take random string, and run through GD library to make it an image (this is the heavy lifting part)

- display the captcha on screen and accept user input

- compare user input with what is stored in session var and react accordingly

 

 

You may do just fine with a simple math quiz that would be trivial to create e.g. what is 5 + 8 (though not as secure)

 

Nate

 

[techexpressinc]

I am confused on how to intergate the PHP code with my HTML form?  Is it a call to a script on the server that happens at time of the POST ?

 

One on my forms that I get the most spam from is:

 

http://www.eldercaremediators.com/join/join.htm

 

I do have a spam stopper on one screen but the hold form is PHP.

http://www.eldercaremediators.com/guestbook/guestbook.htm

 

I should do all this?

"

- create random string and store in session var

- take random string, and run through GD library to make it an image (this is the heavy lifting part)

- display the captcha on screen and accept user input

- compare user input with what is stored in session var and react accordingly

"

[techexpressinc]

Can you help me on how to install the simple math PHP code to Stop

the form submission?

 

I am guessing, it is a php "call" execute somehow integrated with post I have now, but I am confused how to intermix it??

 

This is what I have now:

 

<form method="POST" onsubmit='return formValidator()' 

action="../_vti_bin/shtml.exe/join/join.htm" webbot-action="--WEBBOT-SELF--">
<!--webbot bot="SaveResults" U-File="../_private/form_results2.csv" S-

Format="TEXT/CSV" S-Label-Fields="TRUE" B-Reverse-Chronology="FALSE" S-Email-Format="TEXT/PRE" S-Email-Address="[email protected] 

[email protected]" B-Email-Label-Fields="TRUE" S-Builtin-Fields startspan --><input TYPE="hidden" NAME="VTI-GROUP" VALUE="0"><!--webbot 

bot="SaveResults" i-checksum="43374" endspan -->and 

[chronister]

The form posts to an EXE file, so I am not sure how to implement this at all..

 

It appears that your using some kind of Windows specific web form generator.

 

I have created a simple function that will create a simple math problem, and also display the form. Very easy to use, but how to implement it with a .exe as the form action, I am not sure.

 

save this code to a file somewhere on your server, and use an include to pull it into the page.

 

How to use it is shown at the bottom.

<?php

function mathCaptcha(){

$num1 = rand(0,9); // create first random number
$num2 = rand(0,9); // create second random number
session_start(); // start a session if it is not started
$_SESSION['mathAnswer'] = $num1+$num2; // set a session variable containing the answer of the equation

$equation = 'To help prevent abuse of my form, please answer the following simple math problem<br>'; // set a text string
$equation .= $num1 .' + '. $num2.' <input type="text" name="mathCaptcha" id="mathCaptcha" size="4" />'; // display equation and input box

return $equation; // return the equation string.
}


echo mathCaptcha(); // this is how to call it
?>

 

 

Basically on your processing side, you will want to compare the value of $_POST['mathCaptcha'] to $_SESSION['mathAnswer'] and act accordingly.

 

Nate

 

 

[techexpressinc]

Thanks _ The form is a FrontPage thing I think... 

 

I believe I am going to have to rewrite the form in PHP and then I can try to use math thing.

 

Russ = Rneuman @ SCANINC.com