Zend is pleased to announce the release of Zend Guard 6.0!
You can download this release from: 

Table of Contents:

1. Changes in Zend Guard
2. Known Bugs
3. Installation Instructions
4. System Requirements

1. Changes in Zend Guard 
  1.1 Changes in Zend Guard from version 5.5 to 6.0

 * Full support for PHP 5.4
 * Dropped Support for PHP 5.2 ( Guard 5.5 should be used )

2. Known issues and Limitations

* Encoding/obfuscation for PHP 5.4 is not compatible with PHP 5.3 and 
  earlier releases, and vice versa. That is, a file encoded to run on PHP 5.3 
  will not be loaded on PHP 5.4 and vice versa. 
  Workaround: Encode your application separately to run on PHP 5.3 and PHP 5.4.

* Relative names do not work with --ignore and -?exclude-file
* Using inexact file names (different cases, / instead of \, or not full paths)
  does not work with --ignore and --exclude-file (Windows only)
* "Work only with encoded files" option does not work if it is not applied for all files
* Extending stdClass gives a blank output when a file is encoded

* Using mbstring.func_overload with obfuscation requires exporting functions
  that are overloaded. 

Class Obfuscation:
* Implementing PHP interfaces (such as Iterator) requires exporting
  interface methods
* Autoloading does not work for obfuscated classes (due to different class
* Obfuscating class and function names can break any code that accesses a function
  by string, such as calling a variable function like $func(), or calling a PHP
  internal function to access a class/function as a variable, such as 
  call_user_func($func), etc.
* --export-php may not automatically export some SPL iterator classes

3. Installation Instructions

Double-click on the self-extracting archive, and follow the instructions in the
automated installation wizard.

Extract the downloaded tar.gz file: tar xzvf filename.tar.gz
As soon as the extraction is done, run the extracted binary: ./ZendGuard.bin
and follow the instructions in the installation wizard.

Extract the downloaded .dmg file by double clicking on it.
Double click on the archive directory in order to start the
Zend guard installation wizard and follow the instructions 
in the installation wizard.

* Stanalone Guard Loader - download from www.zend.com and follow readme inside the package

* Guard Loader for Zend Server 6.0.1 - can be downloaded from www.zend.com
  - Windows : Run the ZendGuardLoader_for_PHP54.exe setup to add loader to your PHP54 Zend Server
  - Linux   : <your package manager> install php-5.4-loader-zend-server 
      - vim /usr/local/zend/etc/conf.d/loader.ini
      - uncomment the line: zend_extension_manager.dir.loader=/usr/local/zend/lib/loader

  - Mac : Download ZendGuardLoader-70429-PHP-5.4-darwin10.7-x86_64.zip , unzip and follow readme instructions
 --> Known issue for all above - Zend Guard loader will not be displayed in Zend Server UI

4. System Requirements

- Supported operating systems:
  - Linux    x86
  - Linux    x86-64 ( only with 32 bit libraries )
  - Windows  x86 XP / 7 / 2008
  - Mac OS X 10.8

- PHP Compatibility - Supported PHP versions are 5.3 and 5.4

Support and Feedback:
 * Support for Zend Guard 6.0 and evaluation support is provided via 
   the Zend forums at http://forums.zend.com

Thank you for using Zend Guard
Zend Technologies, Inc.