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