/usr/ is in php-cache 1.5.6-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Cache/
/usr/share/php/.registry/
/usr/share/
/usr/share/php/
/usr/share/php/Cache/Function.php
/usr/share/php/Cache/Container/
/usr/share/php/Cache/Container/shm.php
/usr/share/php/Cache/Container/msession.php
/usr/share/php/Cache/Container/phplib.php
/usr/share/php/Cache/Container/mdb.php
/usr/share/php/Cache/Container/db.php
/usr/share/php/Cache/Container/file.php
/usr/share/php/Cache/Container/trifile.php
/usr/share/php/Cache/Container/dbx.php
/usr/share/php/Cache/Error.php
/usr/share/php/Cache/Container.php
/usr/share/php/Cache/Output.php
/usr/share/php/Cache/Graphics.php
/usr/share/php/Cache/OutputCompression.php
/usr/share/php/Cache/Application.php
/usr/share/php/Cache/HTTP_Request.php
/usr/share/php/Cache.php
/usr/share/php/.registry/cache.reg
/usr/share/php/data/
/usr/share/php/data/Cache/
/usr/share/php/data/Cache/Container/
/usr/share/php/data/Cache/Container/mdb_cache_schema.xml
/usr/share/doc/
/usr/share/doc/php-cache/
/usr/share/doc/php-cache/examples/
/usr/share/doc/php-cache/examples/cache-sample.php
/usr/share/doc/php-cache/package.xml
/usr/share/doc/php-cache/copyright
/usr/share/doc/php-cache/changelog.Debian.gz
/usr/share/doc/php-cache/TODO.Debian