/htdocs/application/helpers/captcha_helper.php
PHP | 412 lines | 223 code | 86 blank | 103 comment | 52 complexity | 239a325ec1a9f2111dd67bf5b12a62c7 MD5 | raw file
Possible License(s): LGPL-3.0, MIT, BSD-3-Clause
- <?php 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 */