summaryrefslogtreecommitdiffstats
path: root/system/helpers/captcha_helper.php
diff options
context:
space:
mode:
Diffstat (limited to 'system/helpers/captcha_helper.php')
-rw-r--r--system/helpers/captcha_helper.php143
1 files changed, 46 insertions, 97 deletions
diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php
index 578796573..bdbc62097 100644
--- a/system/helpers/captcha_helper.php
+++ b/system/helpers/captcha_helper.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* CodeIgniter CAPTCHA Helper
*
@@ -42,7 +40,6 @@
/**
* 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
@@ -57,35 +54,19 @@ if ( ! function_exists('create_captcha'))
foreach ($defaults as $key => $val)
{
- if ( ! is_array($data))
+ if ( ! is_array($data) && empty($$key))
{
- if ( ! isset($$key) OR $$key == '')
- {
- $$key = $val;
- }
+ $$key = $val;
}
else
{
- $$key = ( ! isset($data[$key])) ? $val : $data[$key];
+ $$key = isset($data[$key]) ? $data[$key] : $val;
}
}
- if ($img_path == '' OR $img_url == '')
- {
- return FALSE;
- }
-
- if ( ! @is_dir($img_path))
- {
- return FALSE;
- }
-
- if ( ! is_writable($img_path))
- {
- return FALSE;
- }
-
- if ( ! extension_loaded('gd'))
+ if ($img_path == '' OR $img_url == ''
+ OR ! @is_dir($img_path) OR ! is_writeable($img_path)
+ OR ! extension_loaded('gd'))
{
return FALSE;
}
@@ -97,17 +78,12 @@ if ( ! function_exists('create_captcha'))
$now = microtime(TRUE);
$current_dir = @opendir($img_path);
-
while ($filename = @readdir($current_dir))
{
- if ($filename != '.' && $filename != '..' && $filename != 'index.html')
+ if ($filename !== '.' && $filename !== '..' && $filename !== 'index.html'
+ && (str_replace('.jpg', '', $filename) + $expiration) < $now)
{
- $name = str_replace('.jpg', '', $filename);
-
- if (($name + $expiration) < $now)
- {
- @unlink($img_path.$filename);
- }
+ @unlink($img_path.$filename);
}
}
@@ -117,141 +93,114 @@ if ( ! function_exists('create_captcha'))
// Do we have a "word" yet?
// -----------------------------------
- if ($word == '')
- {
+ if ($word == '')
+ {
$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
-
- $str = '';
- for ($i = 0; $i < 8; $i++)
+ $word = '';
+ for ($i = 0, $mt_rand_max = strlen($pool) - 1; $i < 8; $i++)
{
- $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
+ $word .= $pool[mt_rand(0, $mt_rand_max)];
}
-
- $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);
+ $y_axis = ($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);
- }
+ $im = function_exists('imagecreatetruecolor')
+ ? imagecreatetruecolor($img_width, $img_height)
+ : imagecreate($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);
+ $bg_color = imagecolorallocate($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; $i++)
+ for ($i = 0, $cp = ($circles * $points) - 1; $i < $cp; $i++)
{
- $theta = $theta + $thetac;
- $rad = $radius * ($i / $points );
+ $theta += $thetac;
+ $rad = $radius * ($i / $points);
$x = ($rad * cos($theta)) + $x_axis;
$y = ($rad * sin($theta)) + $y_axis;
- $theta = $theta + $thetac;
+ $theta += $thetac;
$rad1 = $radius * (($i + 1) / $points);
$x1 = ($rad1 * cos($theta)) + $x_axis;
- $y1 = ($rad1 * sin($theta )) + $y_axis;
+ $y1 = ($rad1 * sin($theta)) + $y_axis;
imageline($im, $x, $y, $x1, $y1, $grid_color);
- $theta = $theta - $thetac;
+ $theta -= $thetac;
}
// -----------------------------------
// Write the text
// -----------------------------------
- $use_font = ($font_path != '' && file_exists($font_path) && function_exists('imagettftext')) ? TRUE : FALSE;
-
- if ($use_font == FALSE)
+ $use_font = ($font_path != '' && file_exists($font_path) && function_exists('imagettftext'));
+ if ($use_font === FALSE)
{
$font_size = 5;
- $x = rand(0, $img_width/($length/3));
+ $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;
+ $font_size = 16;
+ $x = rand(0, $img_width / ($length / 1.5));
+ $y = $font_size + 2;
}
- for ($i = 0; $i < strlen($word); $i++)
+ for ($i = 0; $i < $length; $i++)
{
- if ($use_font == FALSE)
+ 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);
+ $y = rand(0 , $img_height / 2);
+ imagestring($im, $font_size, $x, $y, $word[$i], $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));
+ $y = rand($img_height / 2, $img_height - 3);
+ imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, $word[$i]);
$x += $font_size;
}
}
- // -----------------------------------
- // Create the border
- // -----------------------------------
-
- imagerectangle($im, 0, 0, $img_width-1, $img_height-1, $border_color);
+ // Create the border
+ imagerectangle($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=\" \" />";
-
+ $img = '<img src="'.$img_url.$img_name.'" style="width: '.$img_width.'; height: '.$img_height .'; border: 0;" alt=" " />';
ImageDestroy($im);
return array('word' => $word, 'time' => $now, 'image' => $img);
}
}
-// ------------------------------------------------------------------------
-
/* End of file captcha_helper.php */
/* Location: ./system/helpers/captcha_helper.php */ \ No newline at end of file
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-07-01 15:48:58 +0200