/usr/share/php/adodb/session/ is in libphp-adodb 5.15-1+deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/adodb/session/adodb-compress-bzip2.php
/usr/share/php/adodb/session/adodb-compress-gzip.php
/usr/share/php/adodb/session/adodb-cryptsession.php
/usr/share/php/adodb/session/adodb-cryptsession2.php
/usr/share/php/adodb/session/adodb-encrypt-mcrypt.php
/usr/share/php/adodb/session/adodb-encrypt-md5.php
/usr/share/php/adodb/session/adodb-encrypt-secret.php
/usr/share/php/adodb/session/adodb-encrypt-sha1.php
/usr/share/php/adodb/session/adodb-session-clob.php
/usr/share/php/adodb/session/adodb-session-clob2.php
/usr/share/php/adodb/session/adodb-session.php
/usr/share/php/adodb/session/adodb-session2.php
/usr/share/php/adodb/session/crypt.inc.php
/usr/share/php/adodb/session/old/
/usr/share/php/adodb/session/old/adodb-cryptsession.php
/usr/share/php/adodb/session/old/adodb-session-clob.php
/usr/share/php/adodb/session/old/adodb-session.php
/usr/share/php/adodb/session/old/crypt.inc.php
/usr/share/php/adodb/session/session_schema.xml
/usr/share/php/adodb/session/session_schema2.xml