50 lines
1.3 KiB
PHP
50 lines
1.3 KiB
PHP
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<?php
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/*
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* Original Author: Simon Jarvis
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* Copyright: 2006 Simon Jarvis
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* Date: 03/08/06
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* Updated: 07/02/07
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* Requirements: PHP 4/5 with GD and FreeType libraries
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* Link: http://www.white-hat-web-design.co.uk/articles/php-captcha.php
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*
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*
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* Modified by: Mythos and Rini
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* Date: 2007-09-10
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* Description: Modified the code and remove use of Session
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details:
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* http://www.gnu.org/licenses/gpl.html
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*
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*
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*/
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class CaptchaCode
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{
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function generateCode($characters)
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{
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/* list all possible characters, similar looking characters and vowels have been removed */
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$possible = '23456789bcdfghjkmnpqrstvwxyz';
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$code = '';
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$i = 0;
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while ($i < $characters)
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{
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$code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
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$i++;
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}
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return $code;
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}
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}
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