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<?php
/**
* @package Komento
* @copyright Copyright (C) 2012 Stack Ideas Private Limited. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Komento is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
defined('_JEXEC') or die('Restricted access');
require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'parent.php' );
class KomentoControllerCaptcha extends KomentoParentController
{
/**
* Generates a random captcha image
*
**/
function display($cachable = false, $urlparams = false)
{
$id = JRequest::getInt( 'captcha-id' , '' );
$captcha = Komento::getTable( 'Captcha' , 'KomentoTable' );
if( ob_get_length() !== false )
{
while (@ ob_end_clean());
if( function_exists( 'ob_clean' ) )
{
@ob_clean();
}
}
// clearing the oudated keys.
$captcha->clear();
// load the captcha records.
$captcha->load( $id );
if( !$captcha->id )
{
return false;
}
// @task: Generate a very random integer and take only 5 chars max.
$hash = JString::substr( md5( rand( 0, 9999 ) ) , 0 , 5 );
$captcha->response = $hash;
$captcha->store();
// Captcha width and height
$width = 100;
$height = 20;
$image = ImageCreate( $width , $height );
$white = ImageColorAllocate($image, 255, 255, 255);
$black = ImageColorAllocate($image, 0, 0, 0);
$gray = ImageColorAllocate($image, 204, 204, 204);
ImageFill( $image , 0 , 0 , $white );
ImageString( $image , 5 , 30 , 3 , $hash , $black );
ImageRectangle( $image , 0 , 0 , $width - 1 , $height - 1 , $gray );
imageline( $image , 0 , $height / 2 , $width , $height / 2 , $gray );
imageline( $image , $width / 2 , 0 , $width / 2 , $height , $gray );
header( 'Content-type: image/jpeg' );
ImageJpeg( $image );
ImageDestroy($image);
exit;
}
}