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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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915
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Ruebenwurz
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Copyright (C) 2004-2009, 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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require_once("../../../config.php");
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require_once(WB_PATH.'/include/captcha/captcha.php');
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if(!isset($_SESSION['captcha_time']))
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exit;
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unset($_SESSION['captcha_time']);
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// get lists of fonts and backgrounds
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require_once(WB_PATH.'/framework/functions.php');
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$t_fonts = file_list(WB_PATH.'/include/captcha/fonts');
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$t_bgs = file_list(WB_PATH.'/include/captcha/backgrounds');
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$fonts = array();
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$bgs = array();
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foreach($t_fonts as $file) if(eregi('\.ttf$',$file)) $fonts[]=$file;
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foreach($t_bgs as $file) if(eregi('\.png$',$file)) $bgs[]=$file;
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// make random string
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if(!function_exists('randomString')) {
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function randomString($len) {
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list($usec, $sec) = explode(' ', microtime());
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mt_srand((float)$sec + ((float)$usec * 100000));
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//$possible="ABCDEFGHJKLMNPRSTUVWXYZabcdefghkmnpqrstuvwxyz23456789";
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$possible="abdfhkrsvwxz23456789";
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$str="";
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while(strlen($str)<$len) {
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$str.=substr($possible,(mt_rand()%(strlen($possible))),1);
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}
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return($str);
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}
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}
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$text = randomString(5); // number of characters
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$_SESSION['captcha'] = $text;
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// choose a font and background
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$font = $fonts[array_rand($fonts)];
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$bg = $bgs[array_rand($bgs)];
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// get image-dimensions
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list($width, $height, $type, $attr) = getimagesize($bg);
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// create reload-image
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$reload = ImageCreateFromPNG(WB_PATH.'/include/captcha/reload_140_40.png'); // reload-overlay
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if(mt_rand(0,2)==0) { // 1 out of 3
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// draw each character individualy
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$image = ImageCreateFromPNG($bg); // background image
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$grey = mt_rand(0,50);
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$color = ImageColorAllocate($image, $grey, $grey, $grey); // font-color
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$ttf = $font;
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$ttfsize = 25; // fontsize
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$count = 0;
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$image_failed = true;
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$angle = mt_rand(-15,15);
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$x = mt_rand(10,25);
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$y = mt_rand($height-10,$height-2);
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do {
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for($i=0;$i<strlen($text);$i++) {
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$res = imagettftext($image, $ttfsize, $angle, $x, $y, $color, $ttf, $text{$i});
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$angle = mt_rand(-15,15);
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$x = mt_rand($res[4],$res[4]+10);
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$y = mt_rand($height-15,$height-5);
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}
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if($res[4] > $width) {
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$image_failed = true;
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} else {
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$image_failed = false;
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}
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if(++$count > 4) // too many tries! Use the image
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break;
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} while($image_failed);
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} else {
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// draw whole string at once
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$image_failed = true;
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$count=0;
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do {
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$image = ImageCreateFromPNG($bg); // background image
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$grey = mt_rand(0,50);
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$color = ImageColorAllocate($image, $grey, $grey, $grey); // font-color
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$ttf = $font;
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$ttfsize = 25; // fontsize
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$angle = mt_rand(0,5);
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$x = mt_rand(5,30);
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$y = mt_rand($height-10,$height-2);
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$res = imagettftext($image, $ttfsize, $angle, $x, $y, $color, $ttf, $text);
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// check if text fits into the image
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if(($res[0]>0 && $res[0]<$width) && ($res[1]>0 && $res[1]<$height) &&
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($res[2]>0 && $res[2]<$width) && ($res[3]>0 && $res[3]<$height) &&
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($res[4]>0 && $res[4]<$width) && ($res[5]>0 && $res[5]<$height) &&
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($res[6]>0 && $res[6]<$width) && ($res[7]>0 && $res[7]<$height)
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) {
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$image_failed = false;
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}
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if(++$count > 4) // too many tries! Use the image
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break;
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} while($image_failed);
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}
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imagealphablending($reload, TRUE);
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imagesavealpha($reload, TRUE);
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// overlay
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imagecopy($reload, $image, 0,0,0,0, 140,40);
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imagedestroy($image);
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$image = $reload;
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captcha_header();
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ob_start();
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imagepng($image);
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header("Content-Length: ".ob_get_length());
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ob_end_flush();
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imagedestroy($image);
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599
|
Ruebenwurz
|
?>
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