Do you want to create thumbnails for pdf files? You can simply do this with ghostscript. Here’s the php way:

1. First install ghostscript on your server. Download: http://ghostscript.com/releases/
2. Then write your code:

$pathToPdf = “C:\….\PdfFile.pdf”;
$pathToJpg = “C:\….\generatedThumbnail.jpg”;

$gsCall = “\”C:\….\gs\gs8.70\bin\gswin32.exe\” -q -dBATCH -dMaxBitmap=300000000 -dNOPAUSE -dSAFER -sDEVICE=jpeg -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -dFirstPage=1 -dLastPage=1 -sOutputFile={0} {1} -c quit”;

$gsCall = str_replace(array(’{0}’, ‘{1}’), array($pathToJpg, $pathToPdf), $gsCall); // or use sprintf
$str = exec($gsCall, $output=array(), $returnValue);

This code will generate a jpg file with the content of the first page of the pdf file.

Ready.

Here is your example how to implement Zend_Captcha_Image without using Zend_Form.

In your action method:

public function indexAction()
{
//…
$captcha = new Zend_Captcha_Image();
$captcha->setImgDir(APPLICATION_PATH . ‘/../public/tmp/captcha/’);
$captcha->setImgUrl($this->view->baseUrl(’/tmp/captcha/’));
$captcha->setFont(APPLICATION_PATH . ‘/fonts/elephant.ttf’);
$captcha->setWidth(350);
$captcha->setHeight(150);
$captcha->setWordlen(5);
$captcha->setFontSize(70);
$captcha->setLineNoiseLevel(3);
$captcha->generate();
$this->view->captcha = $captcha;   // giving captcha object to the view
//…
}

In the corresponding view render the captcha and add a hidden field with the captcha id:

<form …
<input id=”captcha” type=”text” name=”captcha” />
<?php echo $this->captcha->render($this, null) ?>
<input type=”hidden” name=”cid” value=”<?php echo $this->captcha->getId() ?>” />
….</form>

Validating the input of the user after postback:

// …
$capId = $_POST['cid'];
$capSession = new Zend_Session_Namespace(’Zend_Form_Captcha_’.$capId);
if ($_POST['captcha']==$capSession->word)
{
// input OK
}
else {
// input NOK
}
// …

Good luck!

PS: If you want to use your Zend_Captcha WITH Zend_Form, this blog post may help you: Zend_Captcha with Zend_Form

If you want to delete files by pattern (e.g. “*.txt”) in a directory, you can do this with the php function glob!

$files = glob(’/path/to/files/*.txt’); // finds all txt files in the directory /path/to/files/
foreach($files as $file)
unlink($file);

With this method you can also delete all files of a directory – with pattern *.*

Simple question – simple answer:

How do I delete all files in a directory with PHP?

$files = glob(’/path/to/directory/*.*’);
foreach($files as $file)
unlink($file);

If you want to find out the language or country of the clients browser, do it this way:

<?php
require_once ‘Zend/Locale.php’;
$locale = new Zend_Locale();
echo $locale->toString();
?>

But be aware! This way you only get the localisation of the clients browser. And this is configurable by the user.

The code above will give you output like this:

de_AT

or

en_US

There are many methods you can use with zend localisation:

<?php echo $locale->toString() ?>
<?php echo $locale->getLanguage() ?>
<?php echo $locale->getRegion() ?>
<?php print_r($locale->getBrowser()); // Return an array of all accepted languages of the client ?>

Example output:

de_AT
de
AT
Array ( [de_AT] => 1 [de] => 1 [de_DE] => 0.8 [en_GB] => 0.5 [en] => 0.5 [en_US] => 0.3 )

Good luck!