After installing Debian 9 after a hard-drive died I'm now having problems getting my local installation of mediawiki up and running. I'm using this page as my guide [1] and copied and pasted the stanza "sudo apt-get install apache2 mysql-server php php-mysql libapache2-mod-php php-xml php-mbstring" and installed everything for a 'stretch' installation.

This was not an upgrade of my OS but a straight install using the 'stretch' net-install.iso.

I have installed 'php-xml:all 1:7.0+49' and 'php7.0-mbstring:amd64 7.0.19-1' but the "http://localhost/mediawiki/" is saying -

--8<---------------cut here---------------start------------->8--- MediaWiki 1.28 internal error

Installing some PHP extensions is required.

Required components

You are missing a required extension to PHP that MediaWiki requires to run. Please install:

mbstring (more information) xml (more information) --8<---------------cut here---------------end--------------->8---

So what versions are required then please for a successful mediawiki local installation please?

Thanks Sharon.

[1] - https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Running_MediaWiki_o...