diff options
Diffstat (limited to 'system/helpers/captcha_helper.php')
| -rw-r--r-- | system/helpers/captcha_helper.php | 68 |
1 files changed, 44 insertions, 24 deletions
diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php index f3b9c6cc4..ea46f97b3 100644 --- a/system/helpers/captcha_helper.php +++ b/system/helpers/captcha_helper.php @@ -43,15 +43,31 @@ if ( ! function_exists('create_captcha')) /** * Create CAPTCHA * - * @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 + * @param array $data data for the CAPTCHA + * @param string $img_path path to create the image in + * @param string $img_url URL to the CAPTCHA image folder + * @param string $font_path server path to font * @return string */ function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '') { - $defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200, 'word_length' => 8, 'pool' => '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'); + $defaults = array( + 'word' => '', + 'img_path' => '', + 'img_url' => '', + 'img_width' => '150', + 'img_height' => '30', + 'font_path' => '', + 'expiration' => 7200, + 'word_length' => 8, + 'pool' => '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', + 'colors' => array( + 'background' => array(255,255,255), + 'border' => array(153,102,102), + 'text' => array(204,153,153), + 'grid' => array(255,182,182) + ) + ); foreach ($defaults as $key => $val) { @@ -110,9 +126,9 @@ if ( ! function_exists('create_captcha')) // 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); + $angle = ($length >= 6) ? mt_rand(-($length-6), ($length-6)) : 0; + $x_axis = mt_rand(6, (360/$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 @@ -122,15 +138,19 @@ if ( ! function_exists('create_captcha')) // ----------------------------------- // 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); + // ---------------------------------- + + is_array($colors) OR $colors = $defaults['colors']; + + foreach (array_keys($defaults['colors']) as $key) + { + // Check for a possible missing value + is_array($colors[$key]) OR $colors[$key] = $defaults['colors'][$key]; + $colors[$key] = imagecolorallocate($im, $colors[$key][0], $colors[$key][1], $colors[$key][2]); + } - // Create the rectangle - ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color); + // Create the rectangle + ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $colors['background']); // ----------------------------------- // Create the spiral pattern @@ -151,7 +171,7 @@ if ( ! function_exists('create_captcha')) $rad1 = $radius * (($i + 1) / $points); $x1 = ($rad1 * cos($theta)) + $x_axis; $y1 = ($rad1 * sin($theta)) + $y_axis; - imageline($im, $x, $y, $x1, $y1, $grid_color); + imageline($im, $x, $y, $x1, $y1, $colors['grid']); $theta -= $thetac; } @@ -163,13 +183,13 @@ if ( ! function_exists('create_captcha')) if ($use_font === FALSE) { $font_size = 5; - $x = rand(0, $img_width / ($length / 3)); + $x = mt_rand(0, $img_width / ($length / 3)); $y = 0; } else { $font_size = 16; - $x = rand(0, $img_width / ($length / 1.5)); + $x = mt_rand(0, $img_width / ($length / 1.5)); $y = $font_size + 2; } @@ -177,20 +197,20 @@ if ( ! function_exists('create_captcha')) { if ($use_font === FALSE) { - $y = rand(0 , $img_height / 2); - imagestring($im, $font_size, $x, $y, $word[$i], $text_color); + $y = mt_rand(0 , $img_height / 2); + imagestring($im, $font_size, $x, $y, $word[$i], $colors['text']); $x += ($font_size * 2); } else { - $y = rand($img_height / 2, $img_height - 3); - imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, $word[$i]); + $y = mt_rand($img_height / 2, $img_height - 3); + imagettftext($im, $font_size, $angle, $x, $y, $colors['text'], $font_path, $word[$i]); $x += $font_size; } } // Create the border - imagerectangle($im, 0, 0, $img_width - 1, $img_height - 1, $border_color); + imagerectangle($im, 0, 0, $img_width - 1, $img_height - 1, $colors['border']); // ----------------------------------- // Generate the image |