|
1
|
<?php
|
|
2
|
|
|
3
|
// $Id: captcha.php 390 2006-12-21 00:15:44Z ryan $
|
|
4
|
|
|
5
|
/*
|
|
6
|
|
|
7
|
Website Baker Project <http://www.websitebaker.org/>
|
|
8
|
Copyright (C) 2004-2006, Ryan Djurovich
|
|
9
|
|
|
10
|
Website Baker is free software; you can redistribute it and/or modify
|
|
11
|
it under the terms of the GNU General Public License as published by
|
|
12
|
the Free Software Foundation; either version 2 of the License, or
|
|
13
|
(at your option) any later version.
|
|
14
|
|
|
15
|
Website Baker is distributed in the hope that it will be useful,
|
|
16
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
17
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
18
|
GNU General Public License for more details.
|
|
19
|
|
|
20
|
You should have received a copy of the GNU General Public License
|
|
21
|
along with Website Baker; if not, write to the Free Software
|
|
22
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
23
|
|
|
24
|
*/
|
|
25
|
|
|
26
|
/*
|
|
27
|
|
|
28
|
Captcha generator
|
|
29
|
|
|
30
|
This file generates a captcha image.
|
|
31
|
Credits to http://php.webmaster-kit.com/ for the original code.
|
|
32
|
|
|
33
|
*/
|
|
34
|
|
|
35
|
require_once("../config.php");
|
|
36
|
|
|
37
|
if(extension_loaded('gd') AND function_exists('imageCreateFromJpeg') AND isset($_SESSION['captcha'])) {
|
|
38
|
|
|
39
|
$image = imagecreate(120, 30);
|
|
40
|
|
|
41
|
$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
|
|
42
|
$gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0);
|
|
43
|
$darkgray = imagecolorallocate($image, 0x50, 0x50, 0x50);
|
|
44
|
|
|
45
|
srand((double)microtime()*1000000);
|
|
46
|
|
|
47
|
for($i = 0; $i < 30; $i++) {
|
|
48
|
$x1 = rand(0,120);
|
|
49
|
$y1 = rand(0,30);
|
|
50
|
$x2 = rand(0,120);
|
|
51
|
$y2 = rand(0,30);
|
|
52
|
imageline($image, $x1, $y1, $x2, $y2 , $gray);
|
|
53
|
}
|
|
54
|
|
|
55
|
$x = 0;
|
|
56
|
for($i = 0; $i < 5; $i++) {
|
|
57
|
$fnt = rand(3,5);
|
|
58
|
$x = $x + rand(12 , 20);
|
|
59
|
$y = rand(7 , 12);
|
|
60
|
imagestring($image, $fnt, $x, $y, substr($_SESSION['captcha'], $i, 1), $darkgray);
|
|
61
|
}
|
|
62
|
|
|
63
|
// start buffering for size determination
|
|
64
|
ob_start();
|
|
65
|
// add no cache headers
|
|
66
|
header("Expires: Mon, 1 Jan 1990 05:00:00 GMT");
|
|
67
|
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
|
|
68
|
header("Cache-Control: no-store, no-cache, must-revalidate");
|
|
69
|
header("Cache-Control: post-check=0, pre-check=0", false);
|
|
70
|
header("Pragma: no-cache");
|
|
71
|
header("Content-type: image/png");
|
|
72
|
// Make image
|
|
73
|
imagepng($image);
|
|
74
|
// Fetch length
|
|
75
|
header("Content-Length: " . ob_get_length());
|
|
76
|
// send image and turn off buffering
|
|
77
|
ob_end_flush();
|
|
78
|
// clear memory
|
|
79
|
imagedestroy($image);
|
|
80
|
|
|
81
|
}
|
|
82
|
|
|
83
|
?>
|