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<?php /** * @package Komento * @copyright Copyright (C) 2010 - 2018 Stack Ideas Sdn Bhd. 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('Unauthorized Access'); require_once(__DIR__ . '/base.php'); class KomentoControllerCaptcha extends KomentoControllerBase { /** * Generates the captcha image * * @since 3.0 * @access public */ public function generate() { $id = $this->input->get('id', 0, 'int'); // Clear expired captcha records KT::captcha()->clear(); $table = KT::table('Captcha'); $table->load($id); if (!$id || !$table->id) { throw FH::exception('Invalid captcha id', 500); } // Generate a random integer and take only 5 chars max. $hash = substr(md5(rand(0, 9999)), 0, 5); $table->response = $hash; $table->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 , $gray ); // Clear the output buffer to prevent other contents messing up with the image if (ob_get_length() !== false) { while (@ ob_end_clean()); if (function_exists('ob_clean')) { @ob_clean(); } } header('Content-type: image/jpeg'); ImageJpeg($image); ImageDestroy($image); exit; } }
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