WB 2.11.0

<?php

// $Id: calc_image.php 2 2017-07-02 15:14:29Z Manuela $

/*

 Website Baker Project <http://www.websitebaker.org/>

 Copyright (C) 2004-2009, Ryan Djurovich

 Website Baker is free software; you can redistribute it and/or modify

 it under the terms of the GNU General Public License as published by

 the Free Software Foundation; either version 2 of the License, or

 (at your option) any later version.

 Website Baker is distributed in the hope that it will be useful,

 but WITHOUT ANY WARRANTY; without even the implied warranty of

 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License

 along with Website Baker; if not, write to the Free Software

 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

if ( !defined( 'WB_PATH' ) ){ require( dirname(dirname(dirname((__DIR__)))).'/config.php' ); }

require_once(WB_PATH.'/include/captcha/captcha.php');

if(!isset($_SESSION['captcha_time']))

    exit;

//unset($_SESSION['captcha_time']);

// Captcha

$sec_id = '';

if(isset($_GET['s'])) $sec_id = $_GET['s'];

$_SESSION['captcha'.$sec_id] = '';

mt_srand((double)microtime()*1000000);

$n = mt_rand(1,3);

switch ($n) {

    case 1:

        $x = mt_rand(1,9);

        $y = mt_rand(1,9);

        $_SESSION['captcha'.$sec_id] = $x + $y;

        $cap = "$x+$y"; 

        break; 

    case 2:

        $x = mt_rand(10,20);

        $y = mt_rand(1,9);

        $_SESSION['captcha'.$sec_id] = $x - $y; 

        $cap = "$x-$y"; 

        break;

    case 3:

        $x = mt_rand(2,10);

        $y = mt_rand(2,5);

        $_SESSION['captcha'.$sec_id] = $x * $y; 

        $cap = "$x*$y"; 

        break;

}

// create reload-image

$reload = ImageCreateFromPNG(WB_PATH.'/include/captcha/reload_120_30.png'); // reload-overlay

$image = imagecreate(120, 30);

$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);

$gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0);

$textcolor = imagecolorallocate($image, 0x30, 0x30, 0x30);

for($i = 0; $i < 30; $i++) {

    $x1 = mt_rand(0,120);

    $y1 = mt_rand(0,30);

    $x2 = mt_rand(0,120);

    $y2 = mt_rand(0,30);

    imageline($image, $x1, $y1, $x2, $y2 , $gray);  

}

$Fontfile = ( dirname(__DIR__).'/fonts/LLBd_cond.ttf');

$angle = 0;

$ttfsize = 25; // fontsize

$x =  15;

$l = strlen($cap);

for($i = 0; $i < $l; $i++) {

      $x = $x + mt_rand(10 , 25);

      $y = mt_rand(18, 23);

      $angle = mt_rand(-2, 2);

      $res = imagettftext ($image, $ttfsize, $angle, $x, $y, $textcolor, $Fontfile, substr($cap, $i, 1) );

//    $fnt = mt_rand(5,7);

//    imagestring($image, $fnt, $x, $y, substr($cap, $i, 1), $textcolor); 

}

imagealphablending($reload, TRUE);

imagesavealpha($reload, TRUE);

// overlay

imagecopy($reload, $image, 0,0,0,0, 120,40);

imagedestroy($image);

$image = $reload;

captcha_header();

imagepng($image);

imagedestroy($image);