Here you can download a self-installing package that contains everything you need to preview, check and debug PHP files.
This package will automatically install and configure PHP interpreter and xDebug extension. Versions included in the package are known to be compatible with PHP-related features in Blumentals code editors.
Note: If you want to use another version of the PHP interpreter, you may do so by installing the PHP and xDebug manually. More info can be found in FAQ.