PHP5 packages can be installed on one 16.04 system but not on another

[Chris Green]

On Wed, May 18, 2016 at 12:27:18PM +0100, Colin Law wrote:
> On 18 May 2016 at 11:38, Chris Green <cl at isbd.net> wrote:
> > On Wed, May 18, 2016 at 11:16:04AM +0100, Chris Green wrote:
> >> I have two xubuntu 16.04 systems both with LAMP server software on
> >> them.  On one I can see and successfully install a number of PHP5
> >> packages, in particular php5-sqlite, on the other it can't see this
> >> package at all using apt-search or synaptic.
> >>
> >> I have checked through all the repsitories in /etc/apt and, as far as
> >> I can see, they're identical.
> >>
> >> What is wrong?  I need php5-sqlite on both systems.
> >>
> > I have diff'ed /etc/apt/sources.list between the two systems, it's
> > identical.
> >
> > Here's the result of 'apt-cache search php5' on the system which can't
> > get php5-sqlite:-
> >
> >     chris$ apt-cache search php5
> >     php-auth - Creating an authentication system
> >     php-doc - Documentation for PHP5
> >     php-letodms-lucene - Document management system - Fulltext search
> >     php-memcache - memcache extension module for PHP5
> >     php-memcached - memcached extension module for PHP5, uses libmemcached
> >     phpunit - Unit testing suite for PHP5
> >     bluefish - advanced Gtk+ text editor for web and software development
> >     phing - PHP5 project build system based on Apache Ant
> >     php-http-request2 - Provides an easy way to perform HTTP requests
> >     php-net-dns2 - PHP5 Resolver library used to communicate with a DNS server
> >
> >
> > ... and here's the output on the good system:-
> >
> >     chris at t430$ apt-cache search php5
> >     php-auth - Creating an authentication system
> >     php-doc - Documentation for PHP5
> >     php-letodms-lucene - Document management system - Fulltext search
> >     php-memcache - memcache extension module for PHP5
> >     php-memcached - memcached extension module for PHP5, uses libmemcached
> >     phpunit - Unit testing suite for PHP5
> >     bluefish - advanced Gtk+ text editor for web and software development
> >     phing - PHP5 project build system based on Apache Ant
> >     php-http-request2 - Provides an easy way to perform HTTP requests
> >     php-net-dns2 - PHP5 Resolver library used to communicate with a DNS server
> >     libapache2-mod-php5 - server-side, HTML-embedded scripting language (Apache 2 module)
> >     php5-json - JSON module for php5
> >     php5-readline - Readline module for php5
> >     php5-cli - command-line interpreter for the php5 scripting language
> >     php5-common - Common files for packages built from the php5 source
> >     php5-sqlite - SQLite module for php5
> >
> > What on earth is going on?
> 
> You have not told us what you get, on the good system, for
> apt-cache policy php5-sqlite
> 
I have now.

However I think the 'good' system is actually the 'bad' system, there
shouldn't be any PHP5 packages at all in 16.04.

I was originally trying to fix a bug (in a Wiki that uses sqlite via
PHP) on the 'bad' system.  I have now fixed that, there was a module
that hadn't stayed enabled through the upgrade.

So now my question is - why haven't the PHP5 packages disappeared from
one system, and how do I get rid of them 'properly'?

-- 
Chris Green