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<?php
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// $Id: captcha.php 915 2009-01-21 19:27:01Z Ruebenwurzel $
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/*
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Website Baker Project <http://www.websitebaker.org/>
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Copyright (C) 2004-2009, Ryan Djurovich
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Website Baker is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Website Baker 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. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Website Baker; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// displays the image or text inside an <iframe>
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function display_captcha_real($kind='image') {
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$t = time();
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$_SESSION['captcha_time'] = $t;
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if($kind=='image') {
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?><a title="reload" href="<?php echo WB_URL.'/include/captcha/captcha.php?display_captcha_X986E21=2'; ?>">
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<img style="border: none;" src="<?php echo WB_URL.'/include/captcha/captchas/'.CAPTCHA_TYPE.".php?t=$t"; ?>" alt="Captcha" />
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</a><?php
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} else {
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echo 'error';
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}
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}
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// called from an <iframe>
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if(isset($_GET['display_captcha_X986E21'])) {
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require('../../config.php');
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switch(CAPTCHA_TYPE) {
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case 'calc_image':
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case 'calc_ttf_image':
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case 'ttf_image':
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case 'old_image':
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display_captcha_real('image');
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break;
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}
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exit(0);
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}
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// Make sure page cannot be accessed directly
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if(!defined('WB_PATH')) { exit("Cannot access this file directly"); }
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// check if module language file exists for the language set by the user (e.g. DE, EN)
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global $MOD_CAPTCHA;
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if(!file_exists(WB_PATH.'/modules/captcha_control/languages/'.LANGUAGE .'.php')) {
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// no module language file exists for the language set by the user, include default module language file EN.php
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require_once(WB_PATH.'/modules/captcha_control/languages/EN.php');
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} else {
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// a module language file exists for the language defined by the user, load it
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require_once(WB_PATH.'/modules/captcha_control/languages/'.LANGUAGE .'.php');
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}
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// output-handler for image-captchas to determine size of image
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if(!function_exists('captcha_header')) {
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function captcha_header() {
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header("Expires: Mon, 1 Jan 1990 05:00:00 GMT");
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header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
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header("Cache-Control: no-store, no-cache, must-revalidate, proxy-revalidate");
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header("Cache-Control: post-check=0, pre-check=0", false); // MS made there own headers :-(
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header("Pragma: no-cache");
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header("Content-type: image/png");
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return;
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}
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}
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// get list of available CAPTCHAS for the dropdown-listbox in admin-tools
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if(extension_loaded('gd') && function_exists('imagepng') && function_exists('imagettftext')) {
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$useable_captchas = array(
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'calc_text'=>$MOD_CAPTCHA_CONTROL['CALC_TEXT'],
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'calc_image'=>$MOD_CAPTCHA_CONTROL['CALC_IMAGE'],
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'calc_ttf_image'=>$MOD_CAPTCHA_CONTROL['CALC_TTF_IMAGE'],
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'ttf_image'=>$MOD_CAPTCHA_CONTROL['TTF_IMAGE'],
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'old_image'=>$MOD_CAPTCHA_CONTROL['OLD_IMAGE'],
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'text'=>$MOD_CAPTCHA_CONTROL['TEXT']
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);
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} elseif(extension_loaded('gd') && function_exists('imagepng')) {
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$useable_captchas = array(
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'calc_text'=>$MOD_CAPTCHA_CONTROL['CALC_TEXT'],
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'calc_image'=>$MOD_CAPTCHA_CONTROL['CALC_IMAGE'],
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'old_image'=>$MOD_CAPTCHA_CONTROL['OLD_IMAGE'],
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'text'=>$MOD_CAPTCHA_CONTROL['TEXT']
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);
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} else {
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$useable_captchas = array(
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'calc_text'=>$MOD_CAPTCHA_CONTROL['CALC_TEXT'],
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'text'=>$MOD_CAPTCHA_CONTROL['TEXT']
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);
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}
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if(!function_exists('call_captcha')) {
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function call_captcha($action='all', $style='') {
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global $MOD_CAPTCHA;
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$t = time();
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$_SESSION['captcha_time'] = $t;
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// get width and height of captcha image for use in <iframe>
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switch(CAPTCHA_TYPE) {
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case 'calc_image':
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$captcha_width = 142;
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$captcha_height = 30;
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break;
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case 'calc_ttf_image':
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$captcha_width = 162;
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$captcha_height = 40;
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break;
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case 'ttf_image':
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$captcha_width = 162;
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$captcha_height = 40;
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break;
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case 'old_image':
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$captcha_width = 142;
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$captcha_height = 30;
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break;
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default:
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$captcha_width = 250;
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$captcha_height = 100;
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}
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if($action=='all') {
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switch(CAPTCHA_TYPE) {
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case 'text': // text-captcha
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?><table class="captcha_table"><tr>
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<td class="text_captcha">
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<?php include(WB_PATH.'/include/captcha/captchas/'.CAPTCHA_TYPE.'.php'); ?>
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</td>
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<td></td>
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<td><input type="text" name="captcha" maxlength="50" style="width:150px;" /></td>
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<td class="captcha_expl"><?php echo $MOD_CAPTCHA['VERIFICATION_INFO_QUEST']; ?></td>
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</tr></table><?php
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break;
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case 'calc_text': // calculation as text
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?><table class="captcha_table"><tr>
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<td class="text_captcha">
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<?php include(WB_PATH.'/include/captcha/captchas/'.CAPTCHA_TYPE.'.php'); ?>
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</td>
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<td> = </td>
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<td><input type="text" name="captcha" maxlength="10" style="width:20px;" /></td>
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<td class="captcha_expl"><?php echo $MOD_CAPTCHA['VERIFICATION_INFO_RES']; ?></td>
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</tr></table><?php
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break;
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case 'calc_image': // calculation with image (old captcha)
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case 'calc_ttf_image': // calculation with varying background and ttf-font
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?><table class="captcha_table"><tr>
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<td class="image_captcha">
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<iframe class="captcha_iframe" width="<?php echo $captcha_width; ?>" height="<?php echo $captcha_height; ?>" scrolling="no" marginheight="0" marginwidth="0" frameborder="0" name="captcha_iframe" src="<?php echo WB_URL.'/include/captcha/captcha.php?display_captcha_X986E21=1'; ?>">
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<img src="<?php echo WB_URL.'/include/captcha/captchas/'.CAPTCHA_TYPE.".php?t=$t"; ?>" alt="Captcha" />
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</iframe>
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</td>
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<td> = </td>
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<td><input type="text" name="captcha" maxlength="10" style="width:20px;" /></td>
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<td class="captcha_expl"><?php echo $MOD_CAPTCHA['VERIFICATION_INFO_RES']; ?></td>
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</tr></table><?php
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break;
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// normal images
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case 'ttf_image': // captcha with varying background and ttf-font
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case 'old_image': // old captcha
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?><table class="captcha_table"><tr>
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<td class="image_captcha">
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<iframe class="captcha_iframe" width="<?php echo $captcha_width; ?>" height="<?php echo $captcha_height; ?>" scrolling="no" marginheight="0" marginwidth="0" frameborder="0" name="captcha_iframe" src="<?php echo WB_URL.'/include/captcha/captcha.php?display_captcha_X986E21=1'; ?>">
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<img src="<?php echo WB_URL.'/include/captcha/captchas/'.CAPTCHA_TYPE.".php?t=$t"; ?>" alt="Captcha" />
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</iframe>
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</td>
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<td></td>
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<td><input type="text" name="captcha" maxlength="10" style="width:50px;" /></td>
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<td class="captcha_expl"><?php echo $MOD_CAPTCHA['VERIFICATION_INFO_TEXT']; ?></td>
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</tr></table><?php
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break;
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}
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} elseif($action=='image') {
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switch(CAPTCHA_TYPE) {
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case 'text': // text-captcha
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case 'calc_text': // calculation as text
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echo ($style?"<span $style>":'');
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include(WB_PATH.'/include/captcha/captchas/'.CAPTCHA_TYPE.'.php');
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echo ($style?'</span>':'');
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break;
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case 'calc_image': // calculation with image (old captcha)
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case 'calc_ttf_image': // calculation with varying background and ttf-font
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case 'ttf_image': // captcha with varying background and ttf-font
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case 'old_image': // old captcha
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echo "<img $style src=\"".WB_URL.'/include/captcha/captchas/'.CAPTCHA_TYPE.".php?t=$t\" />";
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break;
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}
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} elseif($action=='image_iframe') {
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switch(CAPTCHA_TYPE) {
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case 'text': // text-captcha
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echo ($style?"<span $style>":'');
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include(WB_PATH.'/include/captcha/captchas/'.CAPTCHA_TYPE.'.php');
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echo ($style?'</span>':'');
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break;
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case 'calc_text': // calculation as text
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include(WB_PATH.'/include/captcha/captchas/'.CAPTCHA_TYPE.'.php');
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break;
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case 'calc_image': // calculation with image (old captcha)
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case 'calc_ttf_image': // calculation with varying background and ttf-font
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case 'ttf_image': // captcha with varying background and ttf-font
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case 'old_image': // old captcha
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?><iframe class="captcha_iframe" width="<?php echo $captcha_width; ?>" height="<?php echo $captcha_height; ?>" scrolling="no" marginheight="0" marginwidth="0" frameborder="0" name="captcha_iframe" src="<?php echo WB_URL.'/include/captcha/captcha.php?display_captcha_X986E21=1'; ?>"><?php
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echo "<img $style alt=\"Captcha\" src=\"".WB_URL.'/include/captcha/captchas/'.CAPTCHA_TYPE.".php?t=$t\" />";
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?></iframe><?php
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break;
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}
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} elseif($action=='input') {
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switch(CAPTCHA_TYPE) {
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case 'text': // text-captcha
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echo '<input type="text" name="captcha" '.($style?$style:'style="width:150px;" maxlength="50"').' />';
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break;
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case 'calc_text': // calculation as text
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case 'calc_image': // calculation with image (old captcha)
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case 'calc_ttf_image': // calculation with varying background and ttf-font
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echo '<input type="text" name="captcha" '.($style?$style:'style="width:20px;" maxlength="10"').' />';
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break;
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case 'ttf_image': // captcha with varying background and ttf-font
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case 'old_image': // old captcha
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echo '<input type="text" name="captcha" '.($style?$style:'style="width:50px;" maxlength="10"').' />';
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break;
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}
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} elseif($action=='text') {
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echo ($style?"<span $style>":'');
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switch(CAPTCHA_TYPE) {
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case 'text': // text-captcha
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echo $MOD_CAPTCHA['VERIFICATION_INFO_QUEST'];
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break;
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case 'calc_text': // calculation as text
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case 'calc_image': // calculation with image (old captcha)
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case 'calc_ttf_image': // calculation with varying background and ttf-font
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echo $MOD_CAPTCHA['VERIFICATION_INFO_RES'];
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break;
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case 'ttf_image': // captcha with varying background and ttf-font
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case 'old_image': // old captcha
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echo $MOD_CAPTCHA['VERIFICATION_INFO_TEXT'];
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break;
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}
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echo ($style?'</span>':'');
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}
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}
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}
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