WB 2.08.x

<?php

// $Id: captcha.php 152 2005-09-19 03:45:14Z ryan $

/*

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

 Copyright (C) 2004-2005, 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.

*/

$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);  

}

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

$cnum[$i] = rand(0,9);

}

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

 $fnt = rand(3,5);

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

 $y = rand(7 , 12); 

 imagestring($image, $fnt, $x, $y, $cnum[$i] , $darkgray); 

}

$digit = "$cnum[0]$cnum[1]$cnum[2]$cnum[3]$cnum[4]";

session_start();

$_SESSION['captcha'] = $digit;

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

imagepng($image);

imagedestroy($image);

?>