mythweb fails with You are missing a php extension for mysql interaction. Please install php-mysqli

[Kevin Dalley]

After upgrading to Ubuntu-17.10, mythweb did not run, and had the following error message:

You are missing a php extension for mysql interaction. Please install php-mysqli

Eventually, I moved to

add-apt-repository ppa:mythbuntu/30

and still had to remove php7.0 packages:

    sudo aptitude remove php7.0

After this step, and restarting apache2

   systemctl restart apache2

mythweb works again

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: mythweb 2:30.0~master.20171026.8e78e24-0ubuntu0mythbuntu2 [origin: LP-PPA-mythbuntu-30]
ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
Uname: Linux 4.13.0-21-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CrashDB: mythbuntu
Date: Thu Jan 4 14:51:05 2018
Installed_mythtv_dbg: 2:30.0~master.20171026.8e78e24-0ubuntu0mythbuntu2
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: mythtv
UpgradeStatus: Upgraded to artful on 2018-01-04 (0 days ago)
modified.conffile..etc.default.mythweb:
 [cfg]
 enable =
 only =
 username =
 password =
mtime.conffile..etc.default.mythweb: 2018-01-04T14:26:12.600503