$captchaSecret = "OASDOIJQWOIJDASDOI";
$emailSecret = "AOSIDJOIQLSDKFMl";

/* Begin easycaptcha validate code */
if (isset($_REQUEST['confirm_code']))
{
	if ( isset($_COOKIE['Captcha']) )
	{
		list($Hash, $Time) = explode('.', $_COOKIE['Captcha']);
		
		$correctHash = md5( $captchaSecret. $_REQUEST['confirm_code']. $_SERVER['REMOTE_ADDR']. $Time );
		if ( $correctHash != $Hash )
		{
			print "Captcha code is wrong.";
		}
		elseif( (time() - 30) > $Time)
		{
			print "Captcha code is only valid for 30 seconds";
		}
		else
		{
			print "Captcha code entered correctly";
			
			// Send a validation e-mail now
			$thisURL = 'http://'.$_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF'];
			
			$emailHash = md5($emailSecret. $_GET['email']);
			$emailToken = substr($emailHash,0,5). '%7C' .urlencode($_GET['email']);
			
			$validateEmailURL = $thisURL.'?emailToken='.$emailToken;
			
			mail(
				$_GET['email'], 
				'Email validation',
				"Please click this link to verify your e-mail address: 
				<a href='".$validateEmailURL."'>".$validateEmailURL."</a>"
			);
			
			die('A validation e-mail was sent to the address your provided. Please open the link in that e-mail
				to continue registration');
		}
	}
	else
	{
		print "No captcha cookie given. Make sure cookies are enabled.";
	}
    /* End easycaptcha validate code */
}
elseif ( isset($_REQUEST['emailToken']) )
{
	/* Begin easyregister validate code */
	
	list($key, $email) = explode('|',$_REQUEST['emailToken'],2);
	
	$correctEmailHash = md5($emailSecret.$email);
	if ( $key !== substr($correctEmailHash,0,5) )
	{
		die("An invalid e-mail token was given, please try again");
	}
	else
	{
		// Set the email-token to a cookie so that he'll remain validated when he submits the registration form
		setcookie('emailToken', $_REQUEST['emailToken']);
	}
	
	// The users e-mail is validated; now we can start processing their registration data
	if ( ! isset($_REQUEST['registrationForm']) )
	{
		// No registration form data entered yet, show the form
		print '<em>You have confirmed your e-mail address. Please fill out the following registration form:</em>';
		require('registrationForm.php');
	}
	else
	{
		// Registration form data present, process the registration and create the validated user
		require('processRegistrationForm.php');
	}
}
else
{
	// This person didn't give a proper captcha code, or is just starting the registration process.
	// Prompt them to enter a captcha code and their e-mail address for validation
	
	print '<form>';
	
	// Easyregister form code
	print 'E-mail address: <input type="text" name="email" /><br />';
	
	/* Begin easycaptcha form code */
	print '<img src="captcha/easycaptcha.php" /><br />
		Enter the code from the above image: <input type="text" name="confirm_code" /><br />';
	
	print '<input type="Submit" value="Submit"/></form>';
	/* End easycaptcha form code */
}