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Revision 145

Added by ryan over 18 years ago

Initial captcha script

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trunk/wb/framework/captcha.php
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<?php
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// $Id$
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/*
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 Website Baker Project <http://www.websitebaker.org/>
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 Copyright (C) 2004-2005, Ryan Djurovich
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 Website Baker is free software; you can redistribute it and/or modify
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 it under the terms of the GNU General Public License as published by
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 the Free Software Foundation; either version 2 of the License, or
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 (at your option) any later version.
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 Website Baker 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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 You should have received a copy of the GNU General Public License
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 along with Website Baker; if not, write to the Free Software
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 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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*/
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/*
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Captcha generator
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This file generates a captcha image.
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Credits to http://php.webmaster-kit.com/ for the original code.
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*/
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$image = imagecreate(120, 30);
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$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
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$gray = imagecolorallocate($image, 0xC0, 0xC0, 0xC0);
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$darkgray = imagecolorallocate($image, 0x50, 0x50, 0x50);
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srand((double)microtime()*1000000);
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for ($i = 0; $i < 30; $i++) {
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  $x1 = rand(0,120);
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  $y1 = rand(0,30);
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  $x2 = rand(0,120);
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  $y2 = rand(0,30);
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  imageline($image, $x1, $y1, $x2, $y2 , $gray);  
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}
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for ($i = 0; $i < 5; $i++) {
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$cnum[$i] = rand(0,9);
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}
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for ($i = 0; $i < 5; $i++) {
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 $fnt = rand(3,5);
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 $x = $x + rand(12 , 20);
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 $y = rand(7 , 12); 
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 imagestring($image, $fnt, $x, $y, $cnum[$i] , $darkgray); 
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}
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$digit = "$cnum[0]$cnum[1]$cnum[2]$cnum[3]$cnum[4]";
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header('Content-type: image/png');
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imagepng($image);
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imagedestroy($image);
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?>
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