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

[Colin Law]

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

Colin