Internal - For local debugging and uses a local copy of PHP 4 or PHP 5.
Server - For debugging remote servers, that are accessed online from the Studio application using Zend Platform's Studio Server Component on the server PHP/Side. When debugging files on a remote server the debugger uses the PHP installed on the remote server. Additional options for debugging are to using Zend Core or separately downloading the debugger component and install them on the server/PHP side.
Zend Core is available for download from: http://www.zend.com/downloads.
The debugger component is available for download from: http://www.zend.com/en/community/pdt#debugger, (Supported Operating Systems are: Windows x86, OS X Mac and Linux x86/x64).
Note:
Do not add the internal debug server which comes with the Internal PHP to the Web server PHP extensions, since it is incompatible with the SAPI module and will NOT work.
