How to use include snippet for debugging ?

Hello,

i want to debug my own snippet to be sure it works fine.
i read documention here to do that.

i obtain a blank page.
What is the right syntax to obtain the absolute path in file parameter when i call include snippet ?
Where do i put include snippet call ?
How does it work with snippet parameters ?

i’m using Netbeans with xdebug and it works fine with another project without modx.

Thanks a lot for explanations
Manu

Thanks to the good Bob Ray’s FAQ

Under the question How should I include files in a snippet?
The answser
include $modx->config[’base_path’] . ’assets/snippets/mysnippet/myfile.php’;

Then I simply replace the snippet’s code I want to test by an include line which point to the external file.
Example with peoplegroup snippet
include $modx->config[’core_path’]. ’components/peoples/elements/snippets/snippet.peoplegroup.php’;

Then I put breakpoint with netbeans in the external file. It’s useful to understand how it works.