/usr/share/php/ is in php-horde-rdo 2.0.2-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/.channel.pear.horde.org/horde_rdo.reg
/usr/share/php/Horde/Rdo.php
/usr/share/php/Horde/Rdo/
/usr/share/php/Horde/Rdo/Exception.php
/usr/share/php/Horde/Rdo/Base.php
/usr/share/php/Horde/Rdo/Factory.php
/usr/share/php/Horde/Rdo/Query.php
/usr/share/php/Horde/Rdo/Iterator.php
/usr/share/php/Horde/Rdo/Query/
/usr/share/php/Horde/Rdo/Query/Literal.php
/usr/share/php/Horde/Rdo/Mapper.php
/usr/share/php/Horde/Rdo/List.php