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PHP - First Captcha Script

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First Captcha Script	View Content

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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();
	}

Add Captcha To Contact Form

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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() );
}
?>

Creating A Captcha Image

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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);
?>