Start PHP file after picture update

I would like to start a trivial xyz.PHP file after an avatar update.
what config in CB auto action would do that?
So far I have trigger is 'After avatar update'
Not sure about the other configs..

CB V2.03, Auto actions V6.0.0

Sorry, don't understand what you're wanting to do. You want to execute PHP after an image is uploaded? Send an HTTP request to a PHP file? What is the intention of the PHP (helps suggest better alternative if possible)? To execute PHP after image upload for example you could use CB Auto Actions on the after profile update and after registration trigger using a Code action then test var1 to var3 (e.g. [var1_avatar] Not Equal To [var3_avatar]) to see if the image field changed.

Sorry if I wasn't clear.
I've a PHP script which copies every new avatar from the CB database to another non CB-related database.
what I would like to do is fire up this script with php (php copyavatarscript.php) whenever the CB-avatar is changed. It's a non html/CB related php script.
So I am looking for the config to do that in Auto Actions.

You could use the Request action to send a GET/POST request to your PHP file. Alternative is to use a Code action and just put your PHP inline into the action, which also will let you use Joomla API to help with the copying.

Say I want to send a GET/POST request. What methode would I define in the actions?
Leave conditions and parameters blank?

Depends on what you need. If you want it to only apply to certain users with a certain field value then add a condition. Adjust the parameters as needed (please read their descriptions for their usage).