Adding Re-Captcha to php-fusion contact page

This 4 step is to install Re-Captcha into your php-fusion contact form,

Download the reCAPTCHA Library,
extract recaptchalib.php in the directory where you your forms live.

If you haven't done so, sign up for an API key.

Now we're ready to start modifying your contact.php code.

• First, add this code to the head of your files:


require_once('recaptchalib.php');
$publickey = "..."; #take it from http://recaptcha.net/api/getkey?app=php
$privatekey = "..."; #take it from http://recaptcha.net/api/getkey?app=php

# the response from reCAPTCHA
$resp = null;
# the error code from reCAPTCHA, if any
$error = null;

• Add this code to validate the CAPTCHA by changing the "sendmessage" condition. Otherwise, the CAPTCHA will appear, but the answers won't be checked. The validation code looks like:

if (!$error) {
if ($_POST["recaptcha_response_field"]) {
$resp = recaptcha_check_answer ($privatekey,
$_SERVER["REMOTE_ADDR"],
$_POST["recaptcha_challenge_field"],
$_POST["recaptcha_response_field"]);

if ($resp->is_valid)
{
require_once INCLUDES."sendmail_include.php";
sendemail($settings['siteusername'],$settings['siteemail'],
\$mailname,$email,$subject,$message);
opentable($locale['400']);
echo "\n".$locale['440']."\n".$locale['441']."\n";
closetable();
}
else
{
opentable($locale['400']);
echo "\n".$locale['900']."\n";
closetable();
}


• Then add the code to display re-captcha, i prefer to put it before submit html process:

  echo recaptcha_get_html($publickey, $error);
  

Add to locale (/locale/English/contact.php) some words to give a warning about wrong re-captcha or whatever you like :)

$locale['900'] = "Wrong re-captcha entry!"

get full script here, modify it as you want :)
cheers.