/**
* main class method; Create the image and return the url to the image file;
* @param string relative path to site root
* @return mixt image url or error
*/
function getImageURL($relpath)
{
$this->garbageCollector();
// check write permissions on captcha folder
$fld = new KT_folder();
$fld->createFolder(KT_CAPTCHA_TEMP_FOLDER);
if (!$fld->checkRights(KT_CAPTCHA_TEMP_FOLDER, 'write')) {
if ($GLOBALS['tNG_debug_mode'] == 'DEVELOPMENT') {
$error = KT_getResource('FOLDER_ERROR_D', 'Captcha', array(KT_CAPTCHA_TEMP_FOLDER));
} else {
$error = KT_getResource('FOLDER_ERROR', 'Captcha');
}
return $this->formatError($error);
}
// with gd
if ($this->lib == "gd") {
$arr["GD Version"] = 'GD not available';
if (function_exists('gd_info')) {
$arr = gd_info();
preg_match("/(2)\\.[\\d]+/i", $arr["GD Version"], $matches);
}
if (!isset($arr) || !isset($matches[1]) || (int) $matches[1] < 2) {
$error = KT_getResource('PHP_GD_VERSION_ERROR', 'Captcha', array($arr["GD Version"]));
return $this->formatError($error);
}
$im = imagecreatefrompng(dirname(__FILE__) . '/captcha.png') or $error = KT_getResource('PHP_GD_ERROR', 'Captcha', array());
if (isset($error)) {
return $this->formatError($error);
}
$string = $this->getTextCaptcha();
$font = imageloadfont(dirname(__FILE__) . "/fonts/Courier.gdf");
if ($font === false) {
$font = 5;
}
$fontFileName = dirname(__FILE__) . '/fonts/MyriadWebPro.ttf';
$wFont = 24;
$hFont = 24;
// write the letters
for ($i = 0; $i < strlen($string); $i++) {
$color1 = rand(0, 64);
$color2 = rand(0, 64);
$color3 = rand(0, 64);
$text_color = imagecolorallocate($im, $color1, $color2, $color3);
$okttf = false;
if (function_exists('imagettftext')) {
$okttf = @imagettftext($im, 14, rand(-25, 25), 10 + $i * $wFont, $hFont + rand(4, 26), $text_color, $fontFileName, $string[$i]);
}
if ($okttf === false) {
$fim = imagecreatetruecolor($wFont + 9, $hFont + 9);
$back = imagecolorallocate($fim, 255, 255, 255);
imagefilledrectangle($fim, 0, 0, $wFont + 8, $hFont + 8, $back);
$transparent2 = imagecolorallocate($fim, 255, 255, 255);
$text_color = imagecolorallocate($fim, $color1, $color2, $color3);
imagestring($fim, $font, 4, 4, $string[$i], $text_color);
if (function_exists("imagerotate")) {
$fim = imagerotate($fim, rand(-25, 25), $transparent2);
}
$iTranspa2 = imagecolortransparent($fim, $transparent2);
imagecopymerge($im, $fim, 0 + $i * $wFont, rand(4, 26), 0, 0, $wFont + 9, $hFont + 9, 80);
imagedestroy($fim);
}
}
imagepng($im, KT_CAPTCHA_TEMP_FOLDER . $this->filename);
imagedestroy($im);
// with imagemagick
} else {
$sourceFileName = dirname(__FILE__) . '/captcha.png';
$fontFileName = dirname(__FILE__) . '/fonts/MyriadWebPro.ttf';
$destFileName = KT_CAPTCHA_TEMP_FOLDER . $this->filename;
$arrCommands = array($GLOBALS['KT_prefered_imagemagick_path'] . 'convert');
$shell = new KT_shell();
$direction = rand(0, 10);
if ($direction % 2 == 0) {
$textRend = -rand(8, 11) . 'x0+' . (5 + (8 - strlen($this->text)) * 20) . '+' . (70 - (8 - strlen($this->text)) * 5);
} else {
$textRend = rand(8, 11) . 'x0+' . (5 + (8 - strlen($this->text)) * 20) . '+' . (35 + (8 - strlen($this->text)) * 5);
}
$arrArguments = array('-font', $fontFileName, '-pointsize', '34', '-fill', 'rgb(' . rand(0, 32) . ',' . rand(0, 32) . ',' . rand(0, 32) . ')', '-annotate', $textRend, $this->text, '-wave', '3x50', '-region', '100x70+' . rand(0, 100) . '+0', '-swirl', '25', '-region', '100x70+' . rand(0, 100) . '+0', '-swirl', '-25', $sourceFileName, $destFileName);
$shell->execute($arrCommands, $arrArguments);
if ($shell->hasError()) {
$arr = $shell->getError();
$ret = $this->formatError($arr[0]);
return $ret;
}
}
return $relpath . KT_CAPTCHA_TEMP_URL . $this->filename;
}
/**
* Check if the folder exists and has write permissions.
* If the folder does not exists, try to create it.
* If the folder does not have write permissions or if could not create it, set error.
* @param string $path the path
* @param string $right the right to check
* @param string $from from what function is called
* @return boolean true if is installed or false if not;
* @access private
*/
function checkFolder($path, $right, $from)
{
if (strtolower(substr(PHP_OS, 0, 1)) == 'w') {
$path = str_replace('/', '\\', $path);
}
if (preg_match("/\\./ims", $path)) {
$arr = split("[/\\]", $path);
array_pop($arr);
$path = implode(DIRECTORY_SEPARATOR, $arr);
}
if (is_file($path)) {
$arr = explode(DIRECTORY_SEPARATOR, $path);
array_pop($arr);
$path = implode(DIRECTORY_SEPARATOR, $arr);
}
$folder = new KT_folder();
$folder->createFolder($path);
if ($right != '') {
$res = $folder->checkRights($path, $right);
if ($res !== true) {
$this->setError('PHP_IMAGE_CHECK_FOLDER_ERROR', array($from), array($from, $path, $right));
}
}
if ($folder->hasError()) {
$arr = $folder->getError();
$this->setError('PHP_IMAGE_FOLDER_ERROR', array($from, $arr[0]), array($from, $arr[1]));
}
}
/**
* Check if the uploaded folder exists and has write permissions.
* If the folder does not exists, try to create it.
* If the folder does not have write permissions or if could not create it, set error.
* @return nothing;
* @access public
*/
function checkFolder()
{
if ($this->fileExists) {
$folder = new KT_folder();
$folder->createFolder($this->folder);
$right = $folder->checkRights($this->folder, 'write');
if ($folder->hasError()) {
$arr = $folder->getError();
$this->setError('PHP_UPLOAD_FOLDER_ERROR', array($arr[0]), array($arr[1]));
}
if ($right !== true) {
$this->setError('PHP_UPLOAD_CHECK_FOLDER_ERROR', array(), array($this->folder));
}
}
}
/**
* verify the rights on the folder of the given file;
* @param string $file the absolute path of the file to be checked;
* @param string $mode the right to be checked: read/write:
* @param string $from the function that needs the check;
* @return nothing;
* @access private
*/
function checkFolder($file, $mode, $from)
{
$folderName = $this->getFolder($file);
$folder = new KT_folder();
$folder->createFolder($folderName);
switch ($mode) {
case 'read':
$right = $folder->checkRights($folderName, 'read');
break;
case 'write':
default:
$right = $folder->checkRights($folderName, 'write');
break;
}
if ($folder->hasError()) {
$arr = $folder->getError();
$this->setError('PHP_FILE_FOLDER_ERROR', array($from, $arr[0]), array($from, $arr[1]));
}
if ($right !== true) {
$this->setError('PHP_FILE_CHECK_FOLDER_ERROR', array($from), array($from, $mode, $folderName));
}
}
