PittaGurneyi

Two options, which I have NOT tested or even verified, if the dependencies can be installed - I just know they exist and MIGHT possibly lead to a working environment: Cygwin - just search online for it, but you need at least some knowledge of what the script depends on and what a basic linux system consists of, to get it working - Windows 10 Linux subsystem - dunno how far along that is and what is available. I myself however won't help anyone in this endeavor since I suspect it will be a bumpy ...

source expects a shell file with commands in it. Just create backup-before.sh with your command "php /var/www/log/backup.before.php" in it. The same with backup-after.sh ... And point CONFIG_prebackup="/path/to/backup-before.sh" in the right direction. It is probably a good idea to add a comment or two in the config file to make this more clear.