All the php images use Xdebug 3.0.4 built from source which does not support php 8.1. Instead of building from source, use the Debian packages provided by sury.org or by Wikimedia. T338208
While at it, since Wikimedia has upgraded to php7.4 (T271736), switch:
- php72 image from Wikimedia to sury.org packages
- php74 image from sury.org to Wikimedia packages
Bug: T338208