website_jukni/pastebin/application/helpers/captcha_helper.php
2017-12-29 15:51:59 +01:00

471 lines
11 KiB
PHP

<?php
/**
* Class and Function List:
* Function list:
* - create_captcha()
* - display_captcha()
* - b()
* Classes list:
*/
if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* CodeIgniter CAPTCHA Helper
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/helpers/xml_helper.html
*/
// ------------------------------------------------------------------------
/**
* Create CAPTCHA
*
* @access public
* @param array array of data for the CAPTCHA
* @param string path to create the image in
* @param string URL to the CAPTCHA image folder
* @param string server path to font
* @return string
*/
if (!function_exists('create_captcha'))
{
function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '')
{
$defaults = array(
'word' => '',
'img_path' => '',
'img_url' => '',
'img_width' => '150',
'img_height' => '30',
'font_path' => '',
'expiration' => 7200
);
foreach ($defaults as $key => $val)
{
if (!is_array($data))
{
if (!isset($$key) OR $$key == '')
{
$$key = $val;
}
}
else
{
$$key = (!isset($data[$key])) ? $val : $data[$key];
}
}
if ($img_path == '' OR $img_url == '')
{
return FALSE;
}
if (!@is_dir($img_path))
{
return FALSE;
}
if (!is_writable($img_path))
{
return FALSE;
}
if (!extension_loaded('gd'))
{
return FALSE;
}
// -----------------------------------
// Remove old images
// -----------------------------------
list($usec, $sec) = explode(" ", microtime());
$now = ((float)$usec + (float)$sec);
$current_dir = @opendir($img_path);
while ($filename = @readdir($current_dir))
{
if ($filename != "." and $filename != ".." and $filename != "index.html")
{
$name = str_replace(".jpg", "", $filename);
if (($name + $expiration) < $now)
{
@unlink($img_path . $filename);
}
}
}
@closedir($current_dir);
// -----------------------------------
// Do we have a "word" yet?
// -----------------------------------
if ($word == '')
{
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$str = '';
for ($i = 0;$i < 8;$i++)
{
$str.= substr($pool, mt_rand(0, strlen($pool) - 1) , 1);
}
$word = $str;
}
// -----------------------------------
// Determine angle and position
// -----------------------------------
$length = strlen($word);
$angle = ($length >= 6) ? rand(-($length - 6) , ($length - 6)) : 0;
$x_axis = rand(6, (360 / $length) - 16);
$y_axis = ($angle >= 0) ? rand($img_height, $img_width) : rand(6, $img_height);
// -----------------------------------
// Create image
// -----------------------------------
// PHP.net recommends imagecreatetruecolor(), but it isn't always available
if (function_exists('imagecreatetruecolor'))
{
$im = imagecreatetruecolor($img_width, $img_height);
}
else
{
$im = imagecreate($img_width, $img_height);
}
// -----------------------------------
// Assign colors
// -----------------------------------
$bg_color = imagecolorallocate($im, 255, 255, 255);
$border_color = imagecolorallocate($im, 153, 102, 102);
$text_color = imagecolorallocate($im, 204, 153, 153);
$grid_color = imagecolorallocate($im, 255, 182, 182);
$shadow_color = imagecolorallocate($im, 255, 240, 240);
// -----------------------------------
// Create the rectangle
// -----------------------------------
ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color);
// -----------------------------------
// Create the spiral pattern
// -----------------------------------
$theta = 1;
$thetac = 7;
$radius = 16;
$circles = 20;
$points = 32;
for ($i = 0;$i < ($circles * $points) - 1;$i++)
{
$theta = $theta + $thetac;
$rad = $radius * ($i / $points);
$x = ($rad * cos($theta)) + $x_axis;
$y = ($rad * sin($theta)) + $y_axis;
$theta = $theta + $thetac;
$rad1 = $radius * (($i + 1) / $points);
$x1 = ($rad1 * cos($theta)) + $x_axis;
$y1 = ($rad1 * sin($theta)) + $y_axis;
imageline($im, $x, $y, $x1, $y1, $grid_color);
$theta = $theta - $thetac;
}
// -----------------------------------
// Write the text
// -----------------------------------
$use_font = ($font_path != '' AND file_exists($font_path) AND function_exists('imagettftext')) ? TRUE : FALSE;
if ($use_font == FALSE)
{
$font_size = 5;
$x = rand(0, $img_width / ($length / 3));
$y = 0;
}
else
{
$font_size = 16;
$x = rand(0, $img_width / ($length / 1.5));
$y = $font_size + 2;
}
for ($i = 0;$i < strlen($word);$i++)
{
if ($use_font == FALSE)
{
$y = rand(0, $img_height / 2);
imagestring($im, $font_size, $x, $y, substr($word, $i, 1) , $text_color);
$x+= ($font_size * 2);
}
else
{
$y = rand($img_height / 2, $img_height - 3);
imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, substr($word, $i, 1));
$x+= $font_size;
}
}
// -----------------------------------
// Create the border
// -----------------------------------
imagerectangle($im, 0, 0, $img_width - 1, $img_height - 1, $border_color);
// -----------------------------------
// Generate the image
// -----------------------------------
$img_name = $now . '.jpg';
ImageJPEG($im, $img_path . $img_name);
$img = "<img src=\"$img_url$img_name\" width=\"$img_width\" height=\"$img_height\" style=\"border:0;\" alt=\" \" />";
ImageDestroy($im);
return array(
'word' => $word,
'time' => $now,
'image' => $img
);
}
}
/**
* Display CAPTCHA
*
* @access public
* @return string
*/
if (!function_exists('display_captcha'))
{
function display_captcha($word = '')
{
$data = '';
list($usec, $sec) = explode(" ", microtime());
$now = ((float)$usec + (float)$sec);
$defaults = array(
'word' => $word,
'img_path' => '',
'img_url' => '',
'img_width' => '180',
'img_height' => '40',
'font_path' => '',
'expiration' => 7200
);
foreach ($defaults as $key => $val)
{
if (!is_array($data))
{
if (!isset($$key) OR $$key == '')
{
$$key = $val;
}
}
else
{
$$key = (!isset($data[$key])) ? $val : $data[$key];
}
}
if (!extension_loaded('gd'))
{
return FALSE;
}
// -----------------------------------
// Do we have a "word" yet?
// -----------------------------------
if ($word == '')
{
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$str = '';
for ($i = 0;$i < 4;$i++)
{
$str.= substr($pool, mt_rand(0, strlen($pool) - 1) , 1);
}
$word = $str;
}
// -----------------------------------
// Determine angle and position
// -----------------------------------
$length = strlen($word);
$angle = ($length >= 6) ? mt_rand(-($length - 6) , ($length - 6)) : 0;
$angle = 10;
$x_axis = mt_rand(6, (360 / $length) - 16);
$y_axis = ($angle >= 0) ? mt_rand($img_height, $img_width) : mt_rand(6, $img_height);
// -----------------------------------
// Create image
// -----------------------------------
// PHP.net recommends imagecreatetruecolor(), but it isn't always available
if (function_exists('imagecreatetruecolor'))
{
$im = imagecreatetruecolor($img_width, $img_height);
}
else
{
$im = imagecreate($img_width, $img_height);
}
// -----------------------------------
// Assign colors
// -----------------------------------
function b()
{
return mt_rand(240, 255);
}
$bg_color = imagecolorallocate($im, b() , b() , b());
$border_color = imagecolorallocate($im, 153, 102, 102);
$text_color = imagecolorallocate($im, 204, 153, 153);
$grid_color = imagecolorallocate($im, 255, 182, 182);
$shadow_color = imagecolorallocate($im, 255, 240, 240);
// -----------------------------------
// Create the rectangle
// -----------------------------------
ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color);
// -----------------------------------
// Create the spiral pattern
// -----------------------------------
$theta = 1;
$thetac = 7;
$radius = 16;
$circles = 20;
$points = 32;
for ($i = 0;$i < ($circles * $points) - 1;$i++)
{
$theta = $theta + $thetac;
$rad = $radius * ($i / $points);
$x = ($rad * cos($theta)) + $x_axis;
$y = ($rad * sin($theta)) + $y_axis;
$theta = $theta + $thetac;
$rad1 = $radius * (($i + 1) / $points);
$x1 = ($rad1 * cos($theta)) + $x_axis;
$y1 = ($rad1 * sin($theta)) + $y_axis;
imageline($im, $x, $y, $x1, $y1, $grid_color);
$theta = $theta - $thetac;
}
// -----------------------------------
// Write the text
// -----------------------------------
//get random font
$fn = explode(',', '4,5,6,8,16,17,19,24,26');
$f = mt_rand(0, count($fn) - 1);
$font_path = './static/fonts/font' . $fn[$f] . '.ttf';
$use_font = ($font_path != '' AND file_exists($font_path) AND function_exists('imagettftext')) ? TRUE : FALSE;
if ($use_font == FALSE)
{
$font_size = 5;
$x = mt_rand(0, $img_width / ($length / 3));
$y = 0;
}
else
{
$font_size = 16;
$x = mt_rand(0, $img_width / ($length / 1.5));
$y = $font_size + 2;
}
for ($i = 0;$i < strlen($word);$i++)
{
if ($use_font == FALSE)
{
$y = mt_rand(0, $img_height / 2);
imagestring($im, $font_size, $x, $y, substr($word, $i, 1) , $text_color);
$x+= ($font_size * 2);
}
else
{
$y = mt_rand($img_height / 2, $img_height - 3);
imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, substr($word, $i, 1));
$x+= $font_size;
}
}
// -----------------------------------
// Create the border
// -----------------------------------
imagerectangle($im, 0, 0, $img_width - 1, $img_height - 1, $border_color);
// -----------------------------------
// Generate the image
// -----------------------------------
$img_name = $now . '.jpg';
echo ImageJPEG($im);
ImageDestroy($im);
}
}
// ------------------------------------------------------------------------
/* End of file captcha_helper.php */
/* Location: ./system/heleprs/captcha_helper.php */