WB 2.11.0

<?php

// $Id: captcha.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

*/

/*

Captcha generator

This file generates a captcha image.

Credits to http://php.webmaster-kit.com/ for the original code.

*/

require_once("../config.php");

if(extension_loaded('gd') AND function_exists('imageCreateFromJpeg') AND isset($_SESSION['captcha'])) {

    $image = imagecreate(120, 30);

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

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

    $darkgray = imagecolorallocate($image, 0x50, 0x50, 0x50);

    srand((double)microtime()*1000000);

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

        $x1 = rand(0,120);

        $y1 = rand(0,30);

        $x2 = rand(0,120);

        $y2 = rand(0,30);

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

    }

    $x = 0;

    for($i = 0; $i < 5; $i++) {

        $fnt = rand(3,5);

        $x = $x + rand(12 , 20);

        $y = rand(7 , 12); 

        imagestring($image, $fnt, $x, $y, substr($_SESSION['captcha'], $i, 1), $darkgray); 

    }

    // start buffering for size determination

    ob_start();

    // add no cache headers

    header("Expires: Mon, 1 Jan 1990 05:00:00 GMT");

    header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

    header("Cache-Control: no-store, no-cache, must-revalidate");

    header("Cache-Control: post-check=0, pre-check=0", false);

    header("Pragma: no-cache");

    header("Content-type: image/png");

    // Make image

    imagepng($image);

    // Fetch length

    header("Content-Length: " . ob_get_length());

    // send image and turn off buffering

    ob_end_flush();

    // clear memory

    imagedestroy($image);

}

?>