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<?php |
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/* |
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You may not change or alter any portion of this comment or credits |
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of supporting developers from this source code or any supporting source code |
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which is considered copyrighted (c) material of the original comment or credit authors. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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/** |
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* CAPTCHA for Image mode |
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* |
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* Based on DuGris' SecurityImage |
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* |
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* PHP 5.3 |
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* |
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* @category Xoops\Class\Captcha\CaptchaMethod |
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* @package CaptchaMethod |
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* @author Taiwen Jiang <[email protected]> |
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* @copyright 2013 XOOPS Project (http://xoops.org) |
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* @license GNU GPL 2 or later (http://www.gnu.org/licenses/gpl-2.0.html) |
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* @version $Id$ |
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* @link http://xoops.org |
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* @since 2.6.0 |
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*/ |
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class XoopsCaptchaImage extends XoopsCaptchaMethod |
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{ |
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/** |
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* XoopsCaptchaImage::isActive() |
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* |
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* @return bool |
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*/ |
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public function isActive() |
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{ |
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if (!extension_loaded('gd')) { |
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trigger_error('GD library is not loaded', E_USER_WARNING); |
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return false; |
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View Code Duplication |
} else { |
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$required_functions = array( |
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'imagecreatetruecolor' , |
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'imagecolorallocate' , |
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'imagefilledrectangle' , |
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'imagejpeg' , |
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'imagedestroy' , |
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'imageftbbox'); |
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foreach ($required_functions as $func) { |
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if (!function_exists($func)) { |
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trigger_error('Function ' . $func . ' is not defined', E_USER_WARNING); |
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return false; |
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} |
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} |
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} |
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return true; |
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} |
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/** |
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* XoopsCaptchaImage::render() |
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* |
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* @return string |
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*/ |
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public function render() |
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{ |
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$xoops_url = \XoopsBaseConfig::get('url'); |
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$js = "<script type='text/javascript'> |
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function xoops_captcha_refresh(imgId) |
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{ |
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xoopsGetElementById(imgId).src = '" . $xoops_url . "/class/captcha/image/scripts/image.php?refresh='+Math.random(); |
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} |
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</script>"; |
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$image = $this->loadImage(); |
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$image .= "<br /><a href=\"javascript: xoops_captcha_refresh('" . ($this->config['name']) . "')\">" . XoopsLocale::CLICK_TO_REFRESH_IMAGE_IF_NOT_CLEAR . "</a>"; |
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$input = '<input type="text" name="' . $this->config['name'] . '" id="' . $this->config['name'] . '" size="' . $this->config['num_chars'] . '" maxlength="' . $this->config['num_chars'] . '" value="" required>'; |
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$rule = XoopsLocale::INPUT_LETTERS_IN_THE_IMAGE; |
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$rule .= '<br />' . (empty($this->config['casesensitive']) ? XoopsLocale::CODE_IS_CASE_INSENSITIVE : XoopsLocale::CODE_IS_CASE_SENSITIVE); |
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View Code Duplication |
if (!empty($this->config['maxattempts'])) { |
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$rule .= '<br />' . sprintf(XoopsLocale::F_MAXIMUM_ATTEMPTS, $this->config['maxattempts']); |
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} |
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return $js . $image . '<br /><br />' . $input . '<br />' . $rule; |
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} |
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/** |
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* XoopsCaptchaImage::loadImage() |
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* |
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* @return string |
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*/ |
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public function loadImage() |
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{ |
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$xoops_url = \XoopsBaseConfig::get('url'); |
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return '<img id="' . ($this->config["name"]) . '" src="' . $xoops_url . '/class/captcha/image/scripts/image.php" onclick=\'this.src="' . $xoops_url . '/class/captcha/image/scripts/image.php?refresh="+Math.random()' . '\' style="cursor: pointer; vertical-align: middle;" alt="" />'; |
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} |
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} |
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geekwright /
XoopsCore
