--- /dev/null
+<?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);
+ }
+}
+
+// ------------------------------------------------------------------------
+
+/* End of file captcha_helper.php */
+/* Location: ./system/heleprs/captcha_helper.php */
\ No newline at end of file
projects / living-lab-site.git / blobdiff