1<?php
2/* Copyright (C) 2005-2007 Laurent Destailleur  <eldy@users.sourceforge.net>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 * or see https://www.gnu.org/
17 */
18
19/**
20 *		\file       htdocs/core/antispamimage.php
21 *		\brief      Return antispam image
22 */
23
24define('NOLOGIN', 1);
25
26if (!defined('NOREQUIREUSER'))   define('NOREQUIREUSER', 1);
27if (!defined('NOREQUIREDB'))     define('NOREQUIREDB', 1);
28if (!defined('NOREQUIRETRAN'))   define('NOREQUIRETRAN', 1);
29if (!defined('NOREQUIREMENU'))   define('NOREQUIREMENU', 1);
30if (!defined('NOREQUIRESOC'))    define('NOREQUIRESOC', 1);
31if (!defined('NOTOKENRENEWAL'))  define('NOTOKENRENEWAL', 1);
32
33require_once '../main.inc.php';
34
35
36/*
37 * View
38 */
39
40$length = 5;
41$letters = 'aAbBCDeEFgGhHJKLmMnNpPqQRsStTuVwWXYZz2345679';
42$number = strlen($letters);
43$string = '';
44for ($i = 0; $i < $length; $i++)
45{
46	$string .= $letters[mt_rand(0, $number - 1)];
47}
48//print $string;
49
50
51$sessionkey = 'dol_antispam_value';
52$_SESSION[$sessionkey] = $string;
53
54$img = imagecreate(80, 32);
55if (empty($img))
56{
57	dol_print_error('', "Problem with GD creation");
58	exit;
59}
60
61// Define mime type
62top_httphead('image/png', 1);
63
64$background_color = imagecolorallocate($img, 250, 250, 250);
65$ecriture_color = imagecolorallocate($img, 0, 0, 0);
66imagestring($img, 4, 24, 8, $string, $ecriture_color);
67imagepng($img);
68