/usr/share/php/Horde/ is in php-horde-cache 2.5.2-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/Cache/
/usr/share/php/Horde/Cache.php
/usr/share/php/Horde/Cache/Exception.php
/usr/share/php/Horde/Cache/Storage/
/usr/share/php/Horde/Cache/Storage/Apc.php
/usr/share/php/Horde/Cache/Storage/Base.php
/usr/share/php/Horde/Cache/Storage/Eaccelerator.php
/usr/share/php/Horde/Cache/Storage/File.php
/usr/share/php/Horde/Cache/Storage/Hashtable.php
/usr/share/php/Horde/Cache/Storage/Memcache.php
/usr/share/php/Horde/Cache/Storage/Memory.php
/usr/share/php/Horde/Cache/Storage/Memoryoverlay.php
/usr/share/php/Horde/Cache/Storage/Mock.php
/usr/share/php/Horde/Cache/Storage/Mongo.php
/usr/share/php/Horde/Cache/Storage/Null.php
/usr/share/php/Horde/Cache/Storage/Session.php
/usr/share/php/Horde/Cache/Storage/Sql.php
/usr/share/php/Horde/Cache/Storage/Stack.php
/usr/share/php/Horde/Cache/Storage/Xcache.php