/usr/share/php/ is in php-cas 1.3.3-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/CAS.php
/usr/share/php/CAS/
/usr/share/php/CAS/Request/
/usr/share/php/CAS/Request/Exception.php
/usr/share/php/CAS/Request/CurlMultiRequest.php
/usr/share/php/CAS/Request/AbstractRequest.php
/usr/share/php/CAS/Request/MultiRequestInterface.php
/usr/share/php/CAS/Request/CurlRequest.php
/usr/share/php/CAS/Request/RequestInterface.php
/usr/share/php/CAS/Exception.php
/usr/share/php/CAS/CookieJar.php
/usr/share/php/CAS/PGTStorage/
/usr/share/php/CAS/PGTStorage/Db.php
/usr/share/php/CAS/PGTStorage/AbstractStorage.php
/usr/share/php/CAS/PGTStorage/File.php
/usr/share/php/CAS/ProxyChain.php
/usr/share/php/CAS/OutOfSequenceBeforeProxyException.php
/usr/share/php/CAS/TypeMismatchException.php
/usr/share/php/CAS/ProxiedService/
/usr/share/php/CAS/ProxiedService/Exception.php
/usr/share/php/CAS/ProxiedService/Http.php
/usr/share/php/CAS/ProxiedService/Testable.php
/usr/share/php/CAS/ProxiedService/Imap.php
/usr/share/php/CAS/ProxiedService/Http/
/usr/share/php/CAS/ProxiedService/Http/Get.php
/usr/share/php/CAS/ProxiedService/Http/Abstract.php
/usr/share/php/CAS/ProxiedService/Http/Post.php
/usr/share/php/CAS/ProxiedService/Abstract.php
/usr/share/php/CAS/Client.php
/usr/share/php/CAS/Autoload.php
/usr/share/php/CAS/OutOfSequenceBeforeAuthenticationCallException.php
/usr/share/php/CAS/GracefullTerminationException.php
/usr/share/php/CAS/OutOfSequenceException.php
/usr/share/php/CAS/ProxyChain/
/usr/share/php/CAS/ProxyChain/AllowedList.php
/usr/share/php/CAS/ProxyChain/Trusted.php
/usr/share/php/CAS/ProxyChain/Interface.php
/usr/share/php/CAS/ProxyChain/Any.php
/usr/share/php/CAS/ProxiedService.php
/usr/share/php/CAS/InvalidArgumentException.php
/usr/share/php/CAS/Languages/
/usr/share/php/CAS/Languages/Greek.php
/usr/share/php/CAS/Languages/German.php
/usr/share/php/CAS/Languages/French.php
/usr/share/php/CAS/Languages/English.php
/usr/share/php/CAS/Languages/Japanese.php
/usr/share/php/CAS/Languages/LanguageInterface.php
/usr/share/php/CAS/Languages/Spanish.php
/usr/share/php/CAS/Languages/Catalan.php
/usr/share/php/CAS/OutOfSequenceBeforeClientException.php
/usr/share/php/CAS/ProxyTicketException.php
/usr/share/php/CAS/AuthenticationException.php