this is only a guide (doc file) to install playsms and smstools3 on debian 11 or ubuntu 22.04, but.....
if you want compile from sources smstools, in this repository you can, with new makefile and some fixes about foder to create:
https://github.com/pappicio/smstools3
enjoy!!!
P.S. fix to php 8.1 https://powerpbx.org/content/playsms15-debian11-v1