diff options
Diffstat (limited to 'system/helpers/captcha_helper.php')
| -rw-r--r-- | system/helpers/captcha_helper.php | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php index 67db50947..3c80bb756 100644 --- a/system/helpers/captcha_helper.php +++ b/system/helpers/captcha_helper.php @@ -40,9 +40,9 @@ 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); - + { + $defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200); + foreach ($defaults as $key => $val) { if ( ! is_array($data)) @@ -53,11 +53,11 @@ if ( ! function_exists('create_captcha')) } } else - { + { $$key = ( ! isset($data[$key])) ? $val : $data[$key]; } } - + if ($img_path == '' OR $img_url == '') { return FALSE; @@ -67,45 +67,45 @@ if ( ! function_exists('create_captcha')) { return FALSE; } - + if ( ! is_writable($img_path)) { return FALSE; } - + if ( ! extension_loaded('gd')) { return FALSE; - } - + } + // ----------------------------------- - // Remove old images + // 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'; @@ -115,23 +115,23 @@ if ( ! function_exists('create_captcha')) { $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1); } - + $word = $str; } - + // ----------------------------------- - // Determine angle and position + // Determine angle and position // ----------------------------------- - + $length = strlen($word); $angle = ($length >= 6) ? rand(-($length-6), ($length-6)) : 0; - $x_axis = rand(6, (360/$length)-16); + $x_axis = rand(6, (360/$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')) { @@ -141,11 +141,11 @@ if ( ! function_exists('create_captcha')) { $im = imagecreate($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); @@ -155,13 +155,13 @@ if ( ! function_exists('create_captcha')) // ----------------------------------- // Create the rectangle // ----------------------------------- - + ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color); - + // ----------------------------------- // Create the spiral pattern // ----------------------------------- - + $theta = 1; $thetac = 7; $radius = 16; @@ -185,9 +185,9 @@ if ( ! function_exists('create_captcha')) // ----------------------------------- // 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; @@ -210,32 +210,32 @@ if ( ! function_exists('create_captcha')) $x += ($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, $border_color); + imagerectangle($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); } } |