Actually I'm not sure if I should report this as PHP is in beta and XDebug is in beta, but I wanted to try it. I used the windows binary. Assigned the dll in the php.ini (XDEBUG) session:

[xdebug]
zend_extension ="C:\xampp\php\phsp_ext\php_xdebug-3.2.0alpha1-8.2-vs16-x86_64.dll"
xdebug.mode=profile,develop,debug
xdebug.start_with_request = trigger
xdebug.client_port = 9000
xdebug.profiler_output_name = cachegrind.out.%t.%p
xdebug.output_dir ="C:\xampp\tmp"
xdebug.show_local_vars=1

But apache gives an error: Failed loading C:\xampp\php\phsp_ext\php_xdebug-3.2.0alpha1-8.2-vs16-x86_64.dll

Running the PHP windows version I get an error message:

'cant find entry point of procedure _zend_get_parameters_array_ex in DLL C:\xampp\php\phsp_ext\php_xdebug-3.2.0alpha1-8.2-vs16-x86_64.dll'

This procedure works fine in all older PHP environments.

Perhaps I'm way too early, so if this post is inappropiate, please delete.