WB 2.08.x

<?php

// $Id: ttf_image.php 610 2008-01-27 00:03:04Z thorn $

/*

 Website Baker Project <http://www.websitebaker.org/>

 Copyright (C) 2004-2008, Ryan Djurovich

 Website Baker is free software; you can redistribute it and/or modify

 it under the terms of the GNU General Public License as published by

 the Free Software Foundation; either version 2 of the License, or

 (at your option) any later version.

 Website Baker is distributed in the hope that it will be useful,

 but WITHOUT ANY WARRANTY; without even the implied warranty of

 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License

 along with Website Baker; if not, write to the Free Software

 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

require_once("../../../config.php");

require_once(WB_PATH.'/include/captcha/captcha.php');

if(!isset($_SESSION['captcha_time']))

	exit;

unset($_SESSION['captcha_time']);

// get lists of fonts and backgrounds

require_once(WB_PATH.'/search/search_modext.php');

list($fonts, $dirs) = list_files_dirs(WB_PATH.'/include/captcha/fonts', false);

list($bgs, $dirs) = list_files_dirs(WB_PATH.'/include/captcha/backgrounds', false);

$fonts = clear_filelist($fonts, '\.ttf$');

$bgs = clear_filelist($bgs, '\.png$');

// make random string

if(!function_exists('randomString')) {

	function randomString($len) {

		list($usec, $sec) = explode(' ', microtime());

		srand((float)$sec + ((float)$usec * 100000));

		//$possible="ABCDEFGHJKLMNPRSTUVWXYZabcdefghkmnpqrstuvwxyz23456789";

		$possible="abdfhkrsvwxz23456789";

		$str="";

		while(strlen($str)<$len) {

			$str.=substr($possible,(rand()%(strlen($possible))),1);

		}

		return($str);

	}

}

$text = randomString(5); // number of characters

$_SESSION['captcha'] = $text; 

// choose a font and background

$font = $fonts[array_rand($fonts)];

$bg = $bgs[array_rand($bgs)];

// get image-dimensions

list($width, $height, $type, $attr) = getimagesize($bg);

// create image

$image = ImageCreateFromPNG($bg); // background image

$grey = rand(0,50);

$color = ImageColorAllocate($image, $grey, $grey, $grey); // font-color

$ttf = $font;

$ttfsize = 25; // fontsize

$angle = rand(-15,15);

$x = rand(10,25);

$y = rand($height-10,$height-2);

if(rand(0,2)==0) { // 1 out of 3

	// draw each character individualy

	$count = 0;

	$image_failed = true;

	do {

		for($i=0;$i<5;$i++) {

			$res = imagettftext($image, $ttfsize, $angle, $x, $y, $color, $ttf, $text{$i});

			$angle = rand(-15,15);

			$x = rand($res[4],$res[4]+10);

			$y = rand($height-15,$height-5);

		}

		if($res[4] > $width) {

			$image_failed = true;

		} else {

			$image_failed = false;

		}

		if(++$count > 4) // too many tries! Use the image

			break;

	} while($image_failed);

} else {

	// draw whole string at once

	$image_failed = true;

	$count=0;

	do {

		$image = ImageCreateFromPNG($bg); // background image

		$grey = rand(0,50);

		$color = ImageColorAllocate($image, $grey, $grey, $grey); // font-color

		$ttf = $font;

		$ttfsize = 25; // fontsize

		$angle = rand(0,5);

		$t_x = rand(5,30);

		$t_y = rand($height-10,$height-2);

		$res = imagettftext($image, $ttfsize, $angle, $t_x, $t_y, $color, $ttf, $text);

		// check if text fits into the image

		if(($res[0]>0 && $res[0]<$width) && ($res[1]>0 && $res[1]<$height) && 

			 ($res[2]>0 && $res[2]<$width) && ($res[3]>0 && $res[3]<$height) && 

			 ($res[4]>0 && $res[4]<$width) && ($res[5]>0 && $res[5]<$height) && 

			 ($res[6]>0 && $res[6]<$width) && ($res[7]>0 && $res[7]<$height)

		) {

			$image_failed = false;

		}

		if(++$count > 5) // too many tries! Use the image

			break;

	} while($image_failed);

}

captcha_header();

ob_start();

imagepng($image);

header("Content-Length: ".ob_get_length()); 

ob_end_flush();

imagedestroy($image);

?>