/usr/ is in php-psr-http-message 1.0-1build1.
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/usr/share/doc/php-psr-http-message/
/usr/share/
/usr/share/php/
/usr/share/php/Psr/
/usr/share/php/Psr/Http/
/usr/share/php/Psr/Http/Message/
/usr/share/php/Psr/Http/Message/StreamInterface.php
/usr/share/php/Psr/Http/Message/UriInterface.php
/usr/share/php/Psr/Http/Message/UploadedFileInterface.php
/usr/share/php/Psr/Http/Message/ResponseInterface.php
/usr/share/php/Psr/Http/Message/MessageInterface.php
/usr/share/php/Psr/Http/Message/RequestInterface.php
/usr/share/php/Psr/Http/Message/autoload.php
/usr/share/php/Psr/Http/Message/ServerRequestInterface.php
/usr/share/doc/
/usr/share/doc/php-psr-http-message/copyright
/usr/share/doc/php-psr-http-message/changelog.Debian.gz