josegonzalez/homebrew-php — pull request #170 by rjocoleman (2012-07-11 11:53:37+00:00)
Title: New Formula: Zend Debugger for PHP 5.3

Due to the close source nature of Zend Debugger this is only available pre-compiled for i386 and x86_64.
The packages available currently support PHP versions 4.3, 4.4, 5.0, 5.1, 5.2 and 5.3.
PHP 5.4 support has not been released by Zend yet.

Further details here: http://static.zend.com/topics/Zend-Debugger-Installation-Guide-050211.pdf

And here: http://files.zend.com/help/previous-version/Zend-Server-5-Community-Edition/working_with_local_debugging.htm