%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* ChronoCMS version 1.0
* Copyright (c) 2012 ChronoCMS.com, All rights reserved.
* Author: (ChronoCMS.com Team)
* license: Please read LICENSE.txt
* Visit http://www.ChronoCMS.com for regular updates and information.
**/
namespace GCore\Helpers\Captcha;
/* @copyright:ChronoEngine.com @license:GPLv2 */defined('_JEXEC') or die('Restricted access');
defined("GCORE_SITE") or die;
class Captcha {
public static function check($field = 'captcha', $key = 'gcore_captcha'){
$posvar = \GCore\Libs\Request::data($field, null);
if(!empty($posvar)){
$session = \GCore\Libs\Base::getSession();
$sessionvar = $session->get($key);
$postvar = strtolower($posvar);
if(md5($postvar) != $sessionvar){
\GCore\Libs\Request::set($field, '');
return false;
}else{
$session->clear($key);
\GCore\Libs\Request::set($field, '');
return true;
}
}else{
return false;
}
}
public static function display($type = 0, $key = 'gcore_captcha'){
@error_reporting(0);
$alphanum = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789abcdefghijkmnpqrstuvwxyz';
$front_chars = substr(str_shuffle($alphanum), 0, 5);
$back_chars = substr(str_shuffle($alphanum), 0, 7);
$session = \GCore\Libs\Base::getSession();
$session->set($key, md5(strtolower($front_chars)));
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
header('Content-type: image/png');
switch($type){
case 1:
$font = dirname(__FILE__).DIRECTORY_SEPARATOR.'default.ttf';
$image_size = imagettfbbox(20, 0, $font, 'X');
$image_size = 5*(abs($image_size[2] - $image_size[0])+7);
$width = $image_size;
$height = 40;
$im = imagecreatetruecolor($width, $height);
// Create some colors
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$greylight = imagecolorallocate($im, 199, 199, 199);
$black = imagecolorallocate($im, 0, 0, 0);
//create the background image rect
imagefilledrectangle($im, 0, 0, $width -1, $height - 1, $white);
// The text to draw
$chars = array();
$chars2 = array();
for($i = 0; $i < strlen($front_chars); $i++){
$chars[] = $front_chars[$i];
}
for($i = 0; $i < strlen($back_chars); $i++){
$chars2[] = $back_chars[$i];
}
$square_count = 6;
for($i = 0; $i < $square_count; $i++){
$cx = (int)rand(0, $width/2);
$cy = (int)rand(0, $height);
$h = $cy + (int)rand(0, $height/5);
$w = $cx + (int)rand($width/3, $width);
imagefilledrectangle($im, $cx, $cy, $w, $h, $greylight);
}
$ellipse_count = 5;
for($i = 0; $i < $ellipse_count; $i++){
$cx = (int)rand(-1*($width/2), $width + ($width/2));
$cy = (int)rand(-1*($height/2), $height + ($height/2));
$h = (int)rand($height/2, 2*$height);
$w = (int)rand($width/2, 2*$width);
imageellipse($im, $cx, $cy, $w, $h, $black);
}
$back_char_size = 20;
$back_char_angle = 0;
$back_char_x = 10;
$back_char_y = 25;
$bbox2 = array();
$bbox2[0] = 0;
$bbox2[2] = 0;
foreach($chars2 as $char2){
$back_char_angle = rand(-20, 20);
$back_char_size = rand(15, 20);
$back_char_y = rand(0, 40);
imagettftext($im, $back_char_size, $back_char_angle, $back_char_x, $back_char_y, $greylight, $font, $char2);
$bbox2 = imagettfbbox($back_char_size, $back_char_angle, $font, $char2);
$back_char_x = $back_char_x + abs($bbox2[2] - $bbox2[0]) + 3;
}
$front_char_size = 20;
$front_char_angle = 0;
$front_char_x = 10;
$front_char_y = 25;
$bbox = array();
$bbox[0] = 0;
$bbox[2] = 0;
// Add the text
foreach($chars as $char){
$front_char_angle = rand(-20, 20);
//$front_char_size = rand(15, 20);
imagettftext($im, $front_char_size, $front_char_angle, $front_char_x, $front_char_y, $black, $font, $char);
$bbox = imagettfbbox($front_char_size, $front_char_angle, $font, $char);
$front_char_x = $front_char_x + abs($bbox[2] - $bbox[0]) + 3;
}
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
break;
case 0:
default:
$image = imagecreatefrompng(dirname(__FILE__).DIRECTORY_SEPARATOR.'background.png');
$greylight = imagecolorallocate($image, 199, 199, 199);
$black = imagecolorallocate($image, 0, 0, 0);
imagestring ($image, 5, 8, 14, $back_chars, $greylight);
imagestring ($image, 5, 5, 11, $front_chars, $black);
imagepng($image);
imagedestroy($image);
break;
}
exit;
}
}
?>
Zerion Mini Shell 1.0