Php.ini in PHP Macro

Hi, I’m using the PHP Macro extension based on quercus, can you tell me where to find the php.ini file?
After studying the documentation, I realized that it is stored in an .xml file, but apparently moved by the developers

The PHP macro extension is just a shortcut to use the Java Scripting API with Quercus and there is basically nothing in it, and I’m afraid there are not much PHP in Java specialist here.

It’s probably better to ask Quercus guys in theory, but the project feels pretty much dead, unfortunately.