12-10-2008, 09:27 PM
Well, I've got the captcha working on my contact form 
The original captcha script comes from this site: http://www.white-hat-web-design.co.uk/ar...aptcha.php
Instructions are provided for script editing there.
**NOTE: copy your original templates and scripts as a backup before changing.
Download their zip file here: http://www.white-hat-web-design.co.uk/ar...aptcha.zip
I have changed the "CaptchaSecurityImages.php" sightly as follows:
On your root directory create the folder "captcha" with the edited "CaptchaSecurityImages.php" and the "monofont.ttf".
In your file "contact_us.php" replace the same start to end section with the following and save:
Next save "contact_us.php" as "contact_success.php" and delete everything between the two lines:
Next change the following section in "contact_success.php":
to the following:
Finally, in the admin CP create the following templates:
"contact_success_break":
"contact_success"
Now edit the template "contact_us" (replace the entire template with the following):
This enables captcha verification as well as remembering form fields if an error was in the submission so the visitor doesn't need to re-enter everything. It also confirms a valid email address in the form.
I've tested on my contact form and it worked in all trials. I'll also post a link when my site goes public ... hopefully in the next few days.
Hope this helps.
The original captcha script comes from this site: http://www.white-hat-web-design.co.uk/ar...aptcha.php
Instructions are provided for script editing there.
**NOTE: copy your original templates and scripts as a backup before changing.
Download their zip file here: http://www.white-hat-web-design.co.uk/ar...aptcha.zip
I have changed the "CaptchaSecurityImages.php" sightly as follows:
Code:
<?php
session_start();
/*
* File: CaptchaSecurityImages.php
* Author: Simon Jarvis
* Copyright: 2006 Simon Jarvis
* Date: 03/08/06
* Updated: 07/02/07
* Requirements: PHP 4/5 with GD and FreeType libraries
* Link: http://www.white-hat-web-design.co.uk/articles/php-captcha.php
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details:
* http://www.gnu.org/licenses/gpl.html
*
*/
class CaptchaSecurityImages {
var $font = 'monofont.ttf';
function generateCode($characters) {
/* list all possible characters, similar looking characters and vowels have been removed */
$possible = '23456789AbcdEfghjkLmNpqRstvwxyz';
$code = '';
$i = 0;
while ($i < $characters) {
$code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
$i++;
}
return $code;
}
function CaptchaSecurityImages($width='120',$height='40',$characters='6') {
$code = $this->generateCode($characters);
/* font size will be 75% of the image height */
$font_size = $height * 0.75;
$image = @imagecreate($width, $height) or die('Cannot initialize new GD image stream');
/* set the colours */
$background_color = imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 121, 151, 195);
$noise_color = imagecolorallocate($image, 210, 218, 230);
/* generate random dots in background */
for( $i=0; $i<($width*$height)/3; $i++ ) {
imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);
}
/* generate random lines in background */
for( $i=0; $i<($width*$height)/150; $i++ ) {
imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);
}
/* create textbox and add text */
$textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Error in imagettfbbox function');
$x = ($width - $textbox[4])/2;
$y = ($height - $textbox[5])/2;
imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Error in imagettftext function');
/* output captcha image to browser */
header('Content-Type: image/jpeg');
imagejpeg($image);
imagedestroy($image);
$_SESSION['capcode'] = $code;
}
}
$width = isset($_GET['width']) ? $_GET['width'] : '120';
$height = isset($_GET['height']) ? $_GET['height'] : '40';
$characters = isset($_GET['characters']) && $_GET['characters'] > 1 ? $_GET['characters'] : '6';
$captcha = new CaptchaSecurityImages($width,$height,$characters);
?>In your file "contact_us.php" replace the same start to end section with the following and save:
Code:
$messages['email_result'] = '';
if(isset($_POST['submit_email'])) {
if($_POST['name'] == NULL || $_POST['email'] == NULL || $_POST['subject'] == NULL || $_POST['message'] == NULL) {
$error = 1;
$messages['email_result'] = '<span class="warningtext"><font color="#cc3333"><strong>One of the fields were left blank.</strong></font></span>
<br />
<br />';
} else if(!preg_match('/^[a-z0-9&\'\.\-_\+]+@[a-z0-9\-]+\.([a-z0-9\-]+\.)*+[a-z]{2}/is', $_POST['email'])) {
$error = 1;
$messages['email_result'] = '<span class="warningtext"><font color="#cc3333"><strong>Please enter a valid email address.</strong></font></span>
<br />
<br />';
} else if( $_SESSION['capcode'] != $_POST['capcode'] || empty($_POST['capcode'] ) ) {
$error = 1;
$messages['email_result'] = '<span class="warningtext"><font color="#cc3333"><strong>The entered confirmation code was not valid.</strong></font></span>
<br />
<br />';
}else{
$error = 2;
$name = check_slashes($_POST['name'], 2);
$email = check_slashes($_POST['email'], 2);
$subject = check_slashes($_POST['subject'], 2);
$message = check_slashes($_POST['message'], 2);
}
if($error == 2) {
$headers = 'From: '. $email . "\r\n" .
'Reply-To: '.$email . "\r\n";
$full_message = 'This message was sent from your TutorialMS installtion\'s Contact Us page.
Sender\'s name: '.$name.'
Sender\'s email: '.$email.'
------------------------------------------------
'.$message.'
------------------------------------------------';
mail($config['ADMIN_EMAIL'], $config['COMPANY_NAME'].' - '.$subject, $full_message, $headers);
echo '<meta HTTP-EQUIV="REFRESH" content="0; url='.HTTP_SERVER.'contact_success.php">';
echo 'Message sent successfully... you are now being redirected.<br />';
}
}
$subjects_un_parsed = $config['CONTACT_US_SUBJECTS'];
$exploded_subjects = explode(';', $subjects_un_parsed);
$bits['contact_us_subjects'] = '';
foreach($exploded_subjects as $value) {
$bits['contact_us_subjects'] .= '<option value="'.$value.'">'.$value.'</option>';
}Code:
require_once('includes/classes/tutorial.php');
/* AND */
echo template(CURRENT_STYLE_ID, 'header');Code:
echo template(CURRENT_STYLE_ID, 'column_middle_start');
echo template(CURRENT_STYLE_ID, 'contact_us_break');
echo template(CURRENT_STYLE_ID, 'contact_us');
echo template(CURRENT_STYLE_ID, 'column_middle_end');Code:
echo template(CURRENT_STYLE_ID, 'column_middle_start');
echo template(CURRENT_STYLE_ID, 'contact_success_break');
echo template(CURRENT_STYLE_ID, 'contact_success');
echo template(CURRENT_STYLE_ID, 'column_middle_end');"contact_success_break":
Code:
<div class="thead">
<!-- THIS IS COMMENTED OUT BECAUSE I DID NOT USE AN ICON
<img src="$config[HTTP_SERVER]images/header_icons/contact.gif" alt="Contact Us" style="margin-right:10px;" />
REMOVE THESE COMMENTS AND TAGS TO USE AN IMAGE-->
<strong>Contact Successful</strong>
</div>
<div class="genmcontainer">Code:
<span class="normaltext">
<b><font color="#cc3333" size="2">Your message was successfully sent.</font></b></span>
<br /><br />
<center><b><font size="2">Your contact is important to us.</font></b>
<br /><br />We appreciate all input and suggestions<br />and will respond at our earliest opportunity</center>
<br /><br />
</div>Code:
<span class="normaltext">
$messages[email_result]Select a subject from the drop-down and then fill out the text area and your message will be emailed to the administrator.</span>
<br /><br />
<if condition="$config[MOD_REWRITE_ON] == 1">
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<else />
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
</if>
<div class="contact">Your Name:</div>
<div style="float: left;"><input type="text" class="form_styles" size="50" name="name" value="<?=$_POST['name'] ?>" /></div>
<div style="clear: both;"></div>
<br />
<div class="contact">Your E-mail Address:</div>
<div style="float: left;"><input type="text" class="form_styles" size="50" name="email" value="<?=$_POST['email'] ?>" /></div>
<div style="clear: both;"></div>
<br />
<div class="contact">Subject:</div>
<div style="float: left;"><select name="subject" class="form_styles">
$bits[contact_us_subjects]
</select></div>
<div style="clear: both;"></div>
<br />
<div class="contact">Your Message:</div>
<div style="float: left;"><textarea name="message" class="form_styles" rows="7" cols="50"><?=$_POST['message'] ?></textarea></div>
<div style="clear: both;"></div>
<br />
<center><b><font color="#cc3333">Confirmation Code</font></b><br /><img src="$config[HTTP_SERVER]captcha/CaptchaSecurityImages.php?width=70&height=30&characters=5"
alt="confirmation" /><br /><i><font size="1">(Code is case sensitive)</font></i><br
/><input class="form_styles" type="text" name="capcode" size="10" /><br /><font color="#cc3333" size="1">Enter the confirmation code into the text box, then Send.</font><br />
<br />
<center><input type="submit" class="form_styles" value="Send" name="submit_email" /></center><br /><br /><i><font size="1">All submitted information is held in strict confidence.</font></i>
</div>I've tested on my contact form and it worked in all trials. I'll also post a link when my site goes public ... hopefully in the next few days.
Hope this helps.