FruityWiFi is a wireless network auditing tool. The application can be installed in any Debian based system (Jessie) adding the extra packages. Tested in Debian, Kali Linux, Kali Linux ARM (Raspberry Pi), Raspbian (Raspberry Pi), Pwnpi (Raspberry Pi), Bugtraq, NetHunter.
When the command is issued at the end of the script php_version's value is 7.3 but the installed version is 7.0.
This happened on a raspberry pi zero W and all I had to do is change
php_version="7.3"
tophp_version="7.0"
and the UI works.