/usr/share/php/ is in php-mdb2 2.5.0b5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/MDB2.php
/usr/share/php/MDB2/
/usr/share/php/MDB2/LOB.php
/usr/share/php/MDB2/Iterator.php
/usr/share/php/MDB2/Extended.php
/usr/share/php/MDB2/Date.php
/usr/share/php/MDB2/Driver/
/usr/share/php/MDB2/Driver/Reverse/
/usr/share/php/MDB2/Driver/Reverse/Common.php
/usr/share/php/MDB2/Driver/Native/
/usr/share/php/MDB2/Driver/Native/Common.php
/usr/share/php/MDB2/Driver/Manager/
/usr/share/php/MDB2/Driver/Manager/Common.php
/usr/share/php/MDB2/Driver/Function/
/usr/share/php/MDB2/Driver/Function/Common.php
/usr/share/php/MDB2/Driver/Datatype/
/usr/share/php/MDB2/Driver/Datatype/Common.php
/usr/share/php/.registry/
/usr/share/php/.registry/mdb2.reg