Zend Optimizer for PHP 5.3
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I see quite a few questions about Zend Optimizer for PHP 5.3 in my Analytics page, hence I will give an answer to this burning question.
Use Zend Guard Loader for PHP 5.3
When you have searched for Zend Optimizer for PHP 5.3 here is something you may not know: Zend Optimizer does not work with PHP 5.3.
Zend Optimizer is only supported for PHP up until version 5.2 and you have to use another decoder for PHP 5.3.
What you need for PHP 5.3 is a runtime decoder named Zend Guard Loader and it works only with PHP 5.3. There is a free download on the Zend Download page. For more information about downloading Zend Guard Loader so the link below.
What about PHP 5.4
As of today 2/8/2013 and a short visit to the Zend download page for the decoders tells me that there is still no support for PHP 5.4 available. Also looking around their website I still see no sign or information when we can expect some encoding and with that decoder support for PHP 5.4.
The only solution or latest version and combination that works is running PHP 5.3 with Zend Guard Loader.
For some more information see my other documents
For further question feel free to leave a comment.