/usr/share/php/ is in php-horde-constraint 2.0.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/
/usr/share/php/Horde/Constraint.php
/usr/share/php/Horde/Constraint/
/usr/share/php/Horde/Constraint/Not.php
/usr/share/php/Horde/Constraint/IsInstanceOf.php
/usr/share/php/Horde/Constraint/Null.php
/usr/share/php/Horde/Constraint/And.php
/usr/share/php/Horde/Constraint/AlwaysFalse.php
/usr/share/php/Horde/Constraint/Coupler.php
/usr/share/php/Horde/Constraint/Or.php
/usr/share/php/Horde/Constraint/IsEqual.php
/usr/share/php/Horde/Constraint/PregMatch.php
/usr/share/php/Horde/Constraint/AlwaysTrue.php
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/.channel.pear.horde.org/horde_constraint.reg