PHP - Captcha Help

Hello everybody, I am new to these forums and registered due to my problems which has been annoying me all the evening... I've been googling for 3 hours and still haven't found a proper answer.

The situation is:

I started to use session in my page.
<?php
ini_set('session.use_cookies', 0);
ini_set('session.use_only_cookies', 0);
ini_set('session.name', 'sid');
ini_set('session.auto_start', 0);
ini_set('session.use_trans_sid', 1);
session_start();
?>
these lines are included in, let's say, my register.php file.
(please, don't recommend me cookies as i'm developing a site for mobiles)

And then, there is a form:
<?php
echo '<form action="register.php?sid='.session_id().'" method="POST">
Įveskite kodą:<br/>
<input class="input" type="text" name="captcha" maxlength="4"/><br/>
<img id="captcha" src="captcha.php?sid='.session_id().'" /><br/>
<input type="submit" name="submit" value="Registruotis" /><br/>
</form>';?>

although captcha is shown, when I submit the form and i have to check inputs I get this error:

Notice: Undefined index: randomnr2 in C:\Program Files\EasyPHP-5.3.3.1\www\new\register.php on line 144

Well, my captcha.php file:

<?php

   $randomnr = rand(1000, 9999);
   $_SESSION['randomnr2'] = $randomnr;
   
   $im = imagecreatetruecolor(100, 38);
 
   $white = imagecolorallocate($im, 255, 255, 255);
   $grey = imagecolorallocate($im, 150, 150, 150);
   $black = imagecolorallocate($im, 0, 0, 0);
 
   imagefilledrectangle($im, 0, 0, 200, 35, $black);

   //path to font - this is just an example you can use any font you like:
   
   $font = dirName(__FILE__).'/font/karate/Karate.ttf';

   imagettftext($im, 20, 4, 22, 30, $grey, $font, $randomnr);
 
   imagettftext($im, 20, 4, 15, 32, $white, $font, $randomnr);
    
   //prevent caching on client side:
   header("Expires: Wed, 1 Jan 1997 00:00:00 GMT");
   header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
   header("Cache-Control: no-store, no-cache, must-revalidate");
   header("Cache-Control: post-check=0, pre-check=0", false);
   header("Pragma: no-cache");
 
   header ("Content-type: image/gif");
   imagegif($im);
   imagedestroy($im);
?>


Any ideas? Thanks in advance.

hi ,frds i am getting trouble .
here is my problem
captcha is working fine in firefox 3.6.16
but not in IE6

help me frds.

Can anyone please take a quick glance at this form the captcha messages are not appearing correctly. The message keeps getting sent.

Thank You

Code: [Select]
<?php
  if(($_SESSION['security_code'] != $_POST['security_code']) || (empty($_SESSION['security_code'])) ){


$to       = "info@*******.com"; // change to your email address
$name     = htmlentities ($_POST['name']);
$email    = htmlentities ($_POST['email']);
$phone    = htmlentities ($_POST['phone']);
$msg      = htmlentities ($_POST['msg']);
$d        = date('l dS \of F Y h:i:s A');
$sub      = "form to mail";
$headers  = "From: $name <$email>\n";  
$headers .= "Content-Type: text/plain; charset=iso-8859-1\n";
$mes      = "phone: ".$phone."\n";
$mes     .= "Message: ".$msg."\n";
$mes     .= "Name: ".$name."\n";
$mes     .= 'Email: '.$email."\n";
$mes     .= 'Date & Time: '.$d;
{
     mail($to, $sub, $mes, $headers);
 
}
echo "<p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><br />CAPTCHA CODE does not match! <p>&nbsp;</p><p>&nbsp;</p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>";
  }
  else 
  echo "THANK YOU";
  

?>

Hi guys, I just decided to add an addition question in my site for submitting a form, not gonna say where coz one of you will most proberly try to prove it doesnt work! I have a feeling its easy enough for someone to send my form by getting the two variables and evaluating them. But how would they do that? and how would they know the names of the variables to send...?

Is there a way of doing a math captcha that cannot be hacked?

How effective is Captcha anymore?

How does using Captcha compare to using a Challenge Question like "2 + 3 = ??"

I am creating a form on my website where users can e-mail me their comments - although my e-mail is hidden - and I don't want this to become a spam-magnet?!   


Debbie

SO I have been developing a log in system and wanted to make my own simple CAPTCHA. I found one on the internet and ported the code across to get started and see how someone had made it. The issue I am having is that the dynamically generated image that I have created it seems is one step ahead of the session variable (the string is generated and then saved into session - then generates the image). But when i echo back the session it is always one step behind the actual image... Anyway here is my code and ask away please

<?php

	require('includes/util.inc.php');

	$form = '
		<form action="register.php" method="post">
			<p>username <input type="text" name="username" id="usrinp"></p>
			<p>email <input type="text" name="email" id="emainp"></p>
			<p>password <input type="password" name="password1" id="psw1inp"></p>
			<p>re-enter password <input type="password" name="password2" id="psw2inp"></p>
			<p><img src="captcha.php"/></p>
			<p>captcha <input type="text" name="captcha" id="capinp"></p>
			<p><input type="submit" value="Register" id="subinp"></p>
		</form>
	';

	if(isset($_SESSION['captcha'])) {
		echo $_SESSION['captcha'];
	}

	if ($_SERVER['REQUEST_METHOD'] == 'POST' && !empty($_POST['username']) && !empty($_POST['email'])) {
		if($_POST['captcha'] == $_SESSION['captcha']) {

			$username = $_POST['username'];
			$email = $_POST['email'];
			$password = SHA1($_POST['password1']);
			$password = SHA1($_POST['password2']);

			$q = 'SELECT username FROM users WHERE username = :username';
			$stmt = $pdo->prepare($q);
			$stmt->bindParam(':username', $username);
			$stmt->execute();

				if($stmt->rowCount() > 0) {
					echo "<pre>This username has already been taken</pre>";
				} else {
					$qi = 'INSERT INTO users ( username, password, email ) VALUES ( :username, SHA1(:password), :email )';
				    $query = $pdo->prepare($qi);
				    $result = $query->execute( array( ':username'=>$username, ':password'=>$password, ':email'=>$email ) );

				    if($result) {
				    	header("location:login.php");
						exit;
				    } else {
				      echo '<pre>Error, please try again</pre>';
				    }
				}

		}

	}

	$pageTitle = 'Register';
	include('includes/header.inc.php');
	include('pages/register.html');

?>

<?php

    require('includes/util.inc.php');

    $string = '';
    for ($i = 0; $i < 5; $i++) {
        $string .= chr(rand(97, 122));
    }
    
    $_SESSION['captcha'] = $string;

    $font_path = 'includes/fonts/';

    $captcha_image = imagecreatetruecolor(150, 60);

    $text_color = imagecolorallocate($captcha_image, 0, 0, 0);
    $bg_color = imagecolorallocate($captcha_image, 255, 255, 255);

    imagefilledrectangle($captcha_image, 0, 0, 399, 99, $bg_color);
    imagettftext($captcha_image, 30, 0, 10, 40, $text_color, $font_path . "dashdot.ttf", $_SESSION['captcha']);

    header("Content-type: image/png");
    imagepng($captcha_image);

?>

<?php 

	session_start();

	function class_loader($class) {
		require 'classes/' . $class . '.class' . '.php';
	}

	spl_autoload_register('class_loader');

	$user = (isset($_SESSION['user'])) ? $_SESSION['user'] : null;
	$cat = (isset($_SESSION['cat'])) ? $_SESSION['cat'] : null;

	try {
		$pdo = new PDO('mysql:dbname=phpcat; host=localhost', 'root', '');
	} catch (PDOException $e) {
		$pageTitle = 'Error!';
		include('header.inc.php');
		include('../pages/error.html');
		exit();
	}

Hello, I am trying to make a captcha, but having some trouble My code matches the tutorial I'm following, the 1st screenshot is the captcha.php file, the 2nd is the captcha_generate.php file, and the 3rd is the result in My browser, I am using firefox and linuxmint 10, with apache2 php5 and GD installed, any Help will be greatly appreciated!!!!!  thanx GOD BLESS!!!



[attachment deleted by admin]

Ideally just one word authentication and pretty simple, but effective.
 
Preferebly one that does not use Sessions because then the user is unable to press the back button to go back to the original page after submitting the form... I know I could just put a text link there but not all users would click that link...

hi
i was wondering if anyone had any idea how i can add code A  to code b below? code a is my captcha code and code b is my contact form code thanks..

CODE A CAPTCHA:
Code: [Select]
<?php
if(isset($_POST["captcha"]))
if($_SESSION["captcha"]==$_POST["captcha"])
{
echo 'CAPTHCA is valid; proceed the message';
}
else
{
echo 'CAPTHCA is not valid; ignore submission';
}
?>
CODE B CONTACT FORM:
Code: [Select]
<?
$mailto = "me@blah.com";
$cc = "";
$bcc = "";
$subject = "Email subject";
$vname = "blah blah";
$email = $_POST['email'];
function validateEmail($email)
{
if(eregi('^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z]{2,4}(\.[a-zA-Z]{2,3})?(\.[a-zA-Z]{2,3})?$', $email))
return true;
else
return false;
}
if(strlen($_POST['name']) < 1  || strlen($_POST['message']) < 1 || validateEmail($email) == FALSE)
{
$emailerror = 'Error:';
if(empty($_POST['name']))
{
$emailerror .= '<li>Enter name</li>';
}
if(validateEmail($email) == FALSE)
{
$emailerror .= '<li>Enter valid email</li>';
}
if(empty($_POST['message']))
{
$emailerror .= '<li>Enter message</li>';
}
}
else
{
$emailerror .= "Your email has been sent successfully";
$timestamp = date("F j, Y, g:ia");
$messageproper ="\n\n" .
"Name: " .
ucwords($_POST['name']) .
"\n" .
"Email: " .
ucwords($email) .
"\n" .
"Comments: " .
$_POST['message'] .
"\n" .
"\n\n" ;
$messageproper = trim(stripslashes($messageproper));
mail($mailto, $subject, $messageproper, "From: \"$vname\" <".$_POST['e_mail'].">\nReply-To: \"".ucwords($_POST['first_name'])."\" <".$_POST['e_mail'].">\nX-Mailer: PHP/" . phpversion() );
}
?>

I am trying to implement the new version of captcha on my website. What i did so far: Inside the FORM:

echo '<div class="g-recaptcha" data-sitekey="XXXXXXXXXXXXXXXXXXXXXXXXXXXX"></div>';

Inside PHP:

$recaptcha = $_POST['g-recaptcha-response'];

if(!empty($recaptcha))
{

    $google_url = "https://www.google.com/recaptcha/api/siteverify";
    $secret = 'YYYYYYYYYYYYYYYYYYYYYYYYYYY';
    $ip = $_SERVER['REMOTE_ADDR'];
    $url = $google_url."?secret=".$secret."&response=".$recaptcha."&remoteip=".$ip;
    $res = getCurlData($url);
    $res = json_decode($res, true);


    if($res['success'] == 'false')
    {
       $captcha_error = "Please re-enter your reCAPTCHA.";
    }

}

The getCurlData function:

function getCurlData($url)
{

  $curl = curl_init();
  curl_setopt($curl, CURLOPT_URL, $url);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($curl, CURLOPT_TIMEOUT, 10);
  curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16");
  $curlData = curl_exec($curl);
  curl_close($curl);
  return $curlData;
}

What i want to achieve is to know when the no-Captcha box is checked. I want to throw an error to the user if he/she did not check that box. So far i only throw an error if the response from Google is "We are not sure if you are human, please proceed to our second level of verification" [if($res['success'] == 'false')]. PS: most of the code is written by Srinivas Tamada. You can find it here. Thanks in advance.

I wrote a small PHP with SQLite script which stores the IP with counter, it works fine with one problem, If I enter the correct password 4th time the counter becomes 4 and I get the error to enter my captcha. All the other times, 1-3 and 5 and above count it just works fine. What am I doing wrong with the logic.   Attaching the zip file with code.   https://drive.google...dit?usp=sharing

Hi I have a script below which I have put together from a couple of other scripts which simply adds an email address to a database for a newsletter and sends an email to the owner and to the user it then shows a success page.
The script checks that the email is valid and there is also a captcha.
The script works in that it only send out the emails if the captcha etc is entered correctly but the email is being added to the database regardless of whether the capture is correct or not. I was proud of myself for getting this far but would love some instruction on what I have missed and how to stop the email adding to the database unless it has passed the captcha.

Below you will see the script. The commented out sections are parts of the old script I don't use.


<?php

  require('includes/application_top.php');

  require(DIR_WS_LANGUAGES . $language . '/' . FILENAME_TESTING);

  $error = false;
  if (isset($HTTP_GET_VARS['action']) && ($HTTP_GET_VARS['action'] == 'send')) {
    //$name = tep_db_prepare_input($HTTP_POST_VARS['name']);
    $email_address = tep_db_prepare_input($HTTP_POST_VARS['email']);
    //$enquiry = tep_db_prepare_input($HTTP_POST_VARS['enquiry']);

    if (tep_validate_email($email_address) == false) {
      $error = true;
      $messageStack->add('testing', ENTRY_EMAIL_ADDRESS_CHECK_ERROR);
    }

//CAPTHCA CODE start
  require(DIR_WS_FUNCTIONS . 'capcha_code.php');

    $code_query = tep_db_query("select code from capcha_code where oscsid = '" . tep_session_id($HTTP_GET_VARS[tep_session_name()]) . "'");
    $code_array = tep_db_fetch_array($code_query);
    $code = $code_array['code'];

    tep_db_query("DELETE FROM " . TABLE_CAPCTHA_CODE . " WHERE oscsid='" . $vvcode_oscsid . "'"); //remove the visual verify code associated with this session to clean database and ensure new results

    $user_entered_code = $HTTP_POST_VARS['capcha_code'];
    if (!(strcasecmp($user_entered_code, $code) == 0)) {    //make the check case insensitive
        $error = true;
        $messageStack->add('testing', CAPCTHA_CODE_ENTRY_ERROR);
    }
//CAPTHCA CODE stop
 /* testing sign up start */

      if (isset($HTTP_POST_VARS['testing_sign_up']))
      {

        $testing_query = tep_db_query("select testing_id_number from " . 
          TABLE_TESTING_SIGN_UP . 
          " where testing_email_address = '" . 
          tep_db_input($email_address) . "'");

        if(tep_db_num_rows($testing_query) == 0)
        {
          $sql_data_array = array('testing_email_address' => $email_address,
                                  'testing_firstname' => "",
                                  'testing_lastname' => "");
          tep_db_perform(TABLE_TESTING_SIGN_UP, $sql_data_array);
        }
      }
      
/* testing sign up end */

    if ($error == false) {
         tep_mail(STORE_OWNER, STORE_OWNER_EMAIL_ADDRESS, EMAIL_SUBJECT, $email_address,STORE_OWNER_EMAIL_ADDRESS);
tep_mail(MESSAGE_TEXT, $email_address, CUSTOMER_SUBJECT, NUMBER_ONE, STORE_OWNER_EMAIL_ADDRESS);
         tep_redirect(tep_href_link(FILENAME_TESTING, 'action=success'));
    }
  }

  $breadcrumb->add(NAVBAR_TITLE, tep_href_link(FILENAME_TESTING));
?>
<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN">
<html <?php echo HTML_PARAMS; ?>>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=<?php echo CHARSET; ?>">
<title><?php echo TITLE; ?></title>
<base href="<?php echo (($request_type == 'SSL') ? HTTPS_SERVER : HTTP_SERVER) . DIR_WS_CATALOG; ?>">
<link rel="stylesheet" type="text/css" href="stylesheet.css">
</head>
<body marginwidth="0" marginheight="0" topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0">
<!-- header //-->
<?php require(DIR_WS_INCLUDES . 'header.php'); ?>
<!-- header_eof //-->

<!-- body //-->
<table border="0" width="100%" cellspacing="3" cellpadding="3">
  <tr>
    <td width="<?php echo BOX_WIDTH; ?>" valign="top"><table border="0" width="<?php echo BOX_WIDTH; ?>" cellspacing="0" cellpadding="2">
<!-- left_navigation //--> <?php require(DIR_WS_INCLUDES . 'column_left.php'); ?> 
<!-- left_navigation_eof //--> </table></td><!-- body_text //--> <td width="100%" valign="top"><?php echo tep_draw_form('testing', tep_href_link(FILENAME_TESTING, 'action=send')); ?><table border="0" width="100%" cellspacing="0" cellpadding="0"> 
<tr> <td><table border="0" width="100%" cellspacing="0" cellpadding="0"> <tr> 
<td class="pageHeading"><?php echo HEADING_TITLE; ?></td><td class="pageHeading" align="right"><?php echo tep_image(DIR_WS_IMAGES . 'table_background_contact_us.gif', HEADING_TITLE, HEADING_IMAGE_WIDTH, HEADING_IMAGE_HEIGHT); ?></td></tr>

</table>
</td></tr><td class="main"><?php echo INFORMATION_TEXT; ?></td>
<tr> 
<td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td></tr> 
<?php
  if ($messageStack->size('testing') > 0) {
?>
      <tr>
        <td><?php echo $messageStack->output('testing'); ?></td>
      </tr>
      <tr>
        <td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td>
      </tr>
<?php
  }

  if (isset($HTTP_GET_VARS['action']) && ($HTTP_GET_VARS['action'] == 'success')) {
?>
      <tr>
        <td class="main" align="left"><?php echo tep_image(DIR_WS_IMAGES . 'clever.gif', HEADING_TITLE, '0', '0', 'align="left"') . TEXT_COMPLETE; ?></td>
      </tr>
      <tr>
        <td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td>
      </tr>
      <tr>
        <td><table border="0" width="100%" cellspacing="1" cellpadding="2" class="infoBox">
          <tr class="infoBoxContents">
            <td><table border="0" width="100%" cellspacing="0" cellpadding="2">
              <tr>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
                <td align="right"><?php echo '<a href="' . tep_href_link(FILENAME_DEFAULT) . '">' . tep_image_button('button_continue.gif', IMAGE_BUTTON_CONTINUE) . '</a>'; ?></td>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>
<?php
  } else {
?>
      <tr>
        <td><table border="0" width="100%" cellspacing="1" cellpadding="2" class="infoBox">
          <tr class="infoBoxContents">
            <td><table border="0" width="100%" cellspacing="0" cellpadding="2" >
              <!--<tr>
                <td class="main"><?php echo ENTRY_NAME; ?></td>
              </tr>
              <tr>
                <td class="main"><?php echo tep_draw_input_field('name'); ?></td>
              </tr>//-->
<tr><td class="main"><?php echo INSTRUCTIONS_TEXT; ?></td></tr>
 
              <tr>
                <td class="main"><?php echo ENTRY_EMAIL; ?>
             
               <?php echo tep_draw_input_field('email'); ?></td>
              </tr>


      <tr>
        <td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td>
      </tr>
              <!--<tr>
                <td class="main"><?php echo ENTRY_ENQUIRY; ?></td>
              </tr>
              <tr>
                
<td><?php echo tep_draw_textarea_field('enquiry', 'soft',
50, 15, $infotext);
?></td>
              </tr>//-->
<!-- CAPTHCA CODE-- START-->
      <tr>
        <td class="main"><?php echo CAPCTHA_CODE_CATEGORY; ?></td>
      </tr>
      <tr>
        <td><table border="0" width="100%" cellspacing="1" cellpadding="2" class="infoBox">
          <tr class="infoBoxContents">
            <td><table border="0" cellspacing="2" cellpadding="2">

              <tr>
                <td class="main"><?php echo CAPCTHA_CODE_TEXT_INSTRUCTIONS; ?></td>
                
                <td class="main">
                  <?php
              // ----- begin garbage collection --------
    tep_db_query("DELETE FROM " . TABLE_CAPCTHA_CODE . " WHERE dt < DATE_SUB(NOW(), INTERVAL 5 HOUR)");
// ----- end garbage collection --------

                      //can replace the following loop with $capcha_code = substr(str_shuffle (CAPCTHA_CODE_CHARACTER_POOL), 0, rand(3,4)); if you have PHP 4.3
                    $capcha_code = "";
                    for ($i = 1; $i <= rand(3,4); $i++){
                          $capcha_code = $capcha_code . substr(CAPCTHA_CODE_CHARACTER_POOL, rand(0, strlen(CAPCTHA_CODE_CHARACTER_POOL)-1), 1);
                     }
                     $vvcode_oscsid = tep_session_id($HTTP_GET_VARS[tep_session_name()]);
                     tep_db_query("DELETE FROM " . TABLE_CAPCTHA_CODE . " WHERE oscsid='" . $vvcode_oscsid . "'");
                     $sql_data_array = array('oscsid' => $vvcode_oscsid, 'code' => $capcha_code);
                     tep_db_perform(TABLE_CAPCTHA_CODE, $sql_data_array);
                     $capcha_code = "";
                     echo('<img src="' . FILENAME_CAPCTHA_CODE_DISPLAY . '?vvc=' . $vvcode_oscsid . '"');
                  ?>
                </td>
                <td class="main"><?php echo CAPCTHA_CODE_BOX_IDENTIFIER; ?></td>
<td class="main"><?php echo tep_draw_input_field('capcha_code'); ?></td>

              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>

<!-- testing sign up start//-->  
<TD WIDTH="100%"> 
<tr> <td class="main" align="right"><?php echo ENTRY_TESTING_SIGN_UP; ?> 
<?php echo tep_draw_checkbox_field('testing_sign_up', '1', true); ?>&nbsp;&nbsp;&nbsp;</td></tr> 
<!--testing sign up end //-->

<!-- CAPTHCA CODE-- STOP -->
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td> 
            </table></td>
          </tr>
        </table></td>
      </tr>
      <tr>
        <td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td>
      </tr>
      <tr>
        <td><table border="0" width="100%" cellspacing="1" cellpadding="2" class="infoBox">
          <tr class="infoBoxContents">
            <td><table border="0" width="100%" cellspacing="0" cellpadding="2">
              <tr>
                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
                <td align="right"><?php echo tep_image_submit('button_continue.gif', IMAGE_BUTTON_CONTINUE); ?></td> 

                <td width="10"><?php echo tep_draw_separator('pixel_trans.gif', '10', '1'); ?></td>
              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>
<?php
  }
?>
    </table></form></td>
<!-- body_text_eof //-->
    <td width="<?php echo BOX_WIDTH; ?>" valign="top"><table border="0" width="<?php echo BOX_WIDTH; ?>" cellspacing="0" cellpadding="2">
<!-- right_navigation //-->
<?php require(DIR_WS_INCLUDES . 'column_right.php'); ?>
<!-- right_navigation_eof //-->
    </table></td>
  </tr>
</table>
<!-- body_eof //-->

<!-- footer //-->
<?php require(DIR_WS_INCLUDES . 'footer.php'); ?>
<!-- footer_eof //-->
<br>
</body>
</html>
<?php require(DIR_WS_INCLUDES . 'application_bottom.php'); ?>

I'm trying to login to a vBulletin forum using a captcha login. I am, however, not able to download the captcha image.

This is the result I get when I try to get the captcha:



So how do I get the captcha image?

This is my current login code:

Code: [Select]
<?php
$user='username';
$pass='password';
$md5Pass = md5($pass);
$data = "do=login&vb_login_md5password=$md5Pass&vb_login_md5password_utf=$md5Pass&vb_login_username=$user&cookieuser=1";

$ch = curl_init();

curl_setopt ($ch, CURLOPT_URL, "http://www.****.com/login.php?do=login");
curl_setopt ($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");
curl_setopt ($ch, CURLOPT_TIMEOUT, '10');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch,CURLOPT_POSTFIELDS,$data);
curl_setopt($ch, CURLOPT_COOKIEJAR, "cookie.txt");
curl_setopt($ch, CURLOPT_COOKIEFILE, "cookie.txt");
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

$store = curl_exec ($ch);
curl_close($ch);
echo $store;
?>

Maybe the site looks for a cookie and only shows the captcha if it finds the cookie file?

Code: [Select]
<?php
/* 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
$width=120;
$height=60;
$image=  imagecreate($width, $height);
$txt=substr(md5(rand()),0,8);

$white=  imagecolorallocate($image, 255, 255, 255);
$black=  imagecolorallocate($image, 0, 0, 0);
$red=  imagecolorallocate($image, 255, 0, 0);
$new=  imagecolorallocate($image, 128, 128, 255);

//imagefilledrectangle($image, 10, 10, 110, 50, $white);
imagefilledrectangle($image, 20, 20, $width-20, $height-20, $new);

imagestring($image, 40, 27, 22, $txt, $black);
header("content-type:image/jpeg");
imagejpeg($image);
imagedestroy($image);
?>

Hi,

I need help in my code. I have written a CAPTCHA code, but it is not appearing when I test run in my website. My code is below, could anyone highlight to me my error? Any problems to those that were highlighted in red? Thanks

<?php
  session_start();

  // Set some important CAPTCHA constants
  define('CAPTCHA_NUMCHARS', 6);  // number of characters in pass-phrase
  define('CAPTCHA_WIDTH', 100);   // width of image
  define('CAPTCHA_HEIGHT', 25);   // height of image

  // Generate the random pass-phrase
  $pass_phrase = "";
  for ($i = 0; $i < CAPTCHA_NUMCHARS; $i++) {
    $pass_phrase .= chr(rand(97, 122)); //chr(), convert a number to its ASCII character equivalent
  }

  // Store the encrypted pass-phrase in a session variable
  $_SESSION['pass_phrase'] = SHA($pass_phrase);

  // Create the image
  $img = imagecreatetruecolor(CAPTCHA_WIDTH, CAPTCHA_HEIGHT);

  // Set a white background with black text and gray graphics
  $bg_color = imagecolorallocate($img, 255, 255, 255);     // white
  $text_color = imagecolorallocate($img, 0, 0, 0);         // black
  $graphic_color = imagecolorallocate($img, 64, 64, 64);   // dark gray

  // Fill the background
  imagefilledrectangle($img, 0, 0, CAPTCHA_WIDTH, CAPTCHA_HEIGHT, $bg_color);

  // Draw some random lines
  for ($i = 0; $i < 5; $i++) {
    imageline($img, 0, rand() % CAPTCHA_HEIGHT, CAPTCHA_WIDTH, rand() % CAPTCHA_HEIGHT, $graphic_color);
  }

  // Sprinkle in some random dots
  for ($i = 0; $i < 50; $i++) {
    imagesetpixel($img, rand() % CAPTCHA_WIDTH, rand() % CAPTCHA_HEIGHT, $graphic_color);
  }

  // Draw the pass-phrase string
  imagettftext($img, 18, 0, 5, CAPTCHA_HEIGHT - 5, $text_color, 'Courier New Bold.ttf', $pass_phrase);

  // Output the image as a PNG using a header
  header("Content-type: image/png");
  imagepng($img);

  // Clean up
  imagedestroy($img);
?>