/usr/share/php/ is in php-horde-smtp 1.6.0-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/horde_smtp.reg
/usr/share/php/data/
/usr/share/php/data/Horde_Smtp/
/usr/share/php/data/Horde_Smtp/locale/
/usr/share/php/data/Horde_Smtp/locale/Horde_Smtp.pot
/usr/share/php/data/Horde_Smtp/locale/es/
/usr/share/php/data/Horde_Smtp/locale/es/LC_MESSAGES/
/usr/share/php/data/Horde_Smtp/locale/es/LC_MESSAGES/Horde_Smtp.po
/usr/share/php/data/Horde_Smtp/locale/es/LC_MESSAGES/Horde_Smtp.mo
/usr/share/php/data/Horde_Smtp/locale/da/
/usr/share/php/data/Horde_Smtp/locale/da/LC_MESSAGES/
/usr/share/php/data/Horde_Smtp/locale/da/LC_MESSAGES/Horde_Smtp.po
/usr/share/php/data/Horde_Smtp/locale/da/LC_MESSAGES/Horde_Smtp.mo
/usr/share/php/data/Horde_Smtp/locale/ja/
/usr/share/php/data/Horde_Smtp/locale/ja/LC_MESSAGES/
/usr/share/php/data/Horde_Smtp/locale/ja/LC_MESSAGES/Horde_Smtp.po
/usr/share/php/data/Horde_Smtp/locale/ja/LC_MESSAGES/Horde_Smtp.mo
/usr/share/php/data/Horde_Smtp/locale/hu/
/usr/share/php/data/Horde_Smtp/locale/hu/LC_MESSAGES/
/usr/share/php/data/Horde_Smtp/locale/hu/LC_MESSAGES/Horde_Smtp.po
/usr/share/php/data/Horde_Smtp/locale/hu/LC_MESSAGES/Horde_Smtp.mo
/usr/share/php/Horde/
/usr/share/php/Horde/Smtp.php
/usr/share/php/Horde/Smtp/
/usr/share/php/Horde/Smtp/Translation.php
/usr/share/php/Horde/Smtp/Exception.php
/usr/share/php/Horde/Smtp/Password.php
/usr/share/php/Horde/Smtp/Password/
/usr/share/php/Horde/Smtp/Password/Xoauth2.php
/usr/share/php/Horde/Smtp/Filter/
/usr/share/php/Horde/Smtp/Filter/Data.php
/usr/share/php/Horde/Smtp/Debug.php
/usr/share/php/Horde/Smtp/Connection.php
/usr/share/php/Horde/Smtp/Lmtp.php