471 lines
11 KiB
PHP
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 */
|