If you own a package, which is encoded with the Zend Safguard Suite you have to install the Zend Optimizer or Zend Guard Loader (as of PHP 5.3). For more information please go to http://www.zend.com/products/zend_optimizer.
The Zend Guard Loader (for PHP >=5.3) is actually only available as an Early Access version: http://forums.zend.com/viewtopic.php?f=57&t=6595
We release our products from time to time for that version. If you need a version encoded with the EA version, which is not available through your pickup depot, just send us an email and we will prepare an EA release.
Also the zend encoded packages need valid licenses to run. The provided licensefiles for the SetaPDF API are named:
.htSetaPDF-<API-NAME>
Please notice that the filename is also prefixed with .ht. Some systems hide such prefixed files automatically.
For zend encoded packages the name of the license file can be changed and has no real meaning. You can load the licensefile dynamically at runtime in your php script before you use the API:
...or change or add the license path to the following directive in your php.ini:
zend_optimizer.license_path = /path/to/your/license
Zended packages are only available for development- and serverlicenses.