/**
* The constructor generates a Captcha image.
*
* @param int $dotNoise The dot noise level. Default: 100.
* @param int $lineNoise The line noise level. Default: 5.
* @param int $wordLen The length of the Captcha word. Default: 6.
* @param int $timeout The timeout in seconds. Default: 1800.
* @return OSS_Captcha_Image
*/
public function __construct($dotNoise = 100, $lineNoise = 5, $wordLen = 6, $timeout = 1800)
{
parent::__construct();
$captchaDir = OSS_Utils::getTempDir() . '/captchas';
if (!file_exists($captchaDir)) {
mkdir($captchaDir, 0777, true);
}
if (strpos(dirname(__FILE__), 'src/') === false) {
$font = dirname(__FILE__) . '/../../data/font/freeserif.ttf';
} else {
$font = dirname(__FILE__) . '/../../../data/font/freeserif.ttf';
}
$this->setTimeout($timeout)->setWordLen($wordLen)->setHeight(80)->setFont($font)->setFontSize(40)->setImgDir($captchaDir)->setDotNoiseLevel($dotNoise)->setLineNoiseLevel($lineNoise);
return $this;
}
/**
* Converts a HTML file to PDF using htmldoc. Please note that the current stable version of htmldoc (v1.8.27) does not support CSS. Make sure PHP has write permission in the
* output directory. Also don't forget that relative paths are relative to the currently executing PHP script (include() and require() doesn't count in that).
* Using command line OpenOffice might be a better solution (a necessary macro and a tiny, one line shell script are available on the internet), as it supports everything in the HTML,
* CSS, images, etc, while the htmldoc 1.9.x is still in "developer snapshot" state.
*
* @param string $html the input HTML file name
* @param string $pdf the output PDF file name
* @param bool $embedFonts default false embed the used fonts to the genereated PDF or not - can save 100's of kBytes even in a plain PDF (think of email sending)
* @return bool
*/
public static function HtmlToPdf($html, $pdf, $embedFonts = false)
{
$tempFile = OSS_Utils::getTempDir() . '/html_to_pdf_' . md5(mt_rand()) . '.html';
$res = file_put_contents($tempFile, mb_convert_encoding(file_get_contents($html), 'HTML-ENTITIES'));
if (!$res) {
return false;
}
// a ' &> /dev/null' at the end of the command should work, but it doesn't
$command = 'htmldoc --webpage --continuous --compression=9' . ($embedFonts == false ? ' --no-embedfonts' : '') . ' --fontsize 10 --size A4 --top 2cm --bottom 2cm --left 2cm --right 2cm -t pdf14 -f ' . escapeshellarg($pdf) . ' ' . escapeshellarg($tempFile);
//print "\n\n" . $vCommand . "\n\n"; die();
//file_put_contents('../var/tmp/command.txt', $vCommand);
$res = @exec($command);
if (!$res) {
return false;
}
return @file_exists($pdf);
}
/**
* Takes an id as a parameter, and prints the matching CAPTCHA image as a binary raw string to the output,
* or prints nothing if no matching CAPTCHA found.
*/
public function captchaImageAction()
{
$captchaId = preg_replace("/[^0-9a-z]+/u", '', strtolower(basename($this->_getParam('id'))));
$captchaFile = OSS_Utils::getTempDir() . "/captchas/{$captchaId}.png";
if (@file_exists($captchaFile)) {
Zend_Controller_Action_HelperBroker::removeHelper('viewRenderer');
@ob_end_clean();
header('Content-type: image/png');
@readfile($captchaFile);
} else {
$this->_forward('error-404', 'error');
}
}
