/usr/share/php/PEAR/Command/ is in php-pear 1:1.10.5+submodules+notgz-1ubuntu1.18.04.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/PEAR/Command/Auth.php
/usr/share/php/PEAR/Command/Auth.xml
/usr/share/php/PEAR/Command/Build.php
/usr/share/php/PEAR/Command/Build.xml
/usr/share/php/PEAR/Command/Channels.php
/usr/share/php/PEAR/Command/Channels.xml
/usr/share/php/PEAR/Command/Common.php
/usr/share/php/PEAR/Command/Config.php
/usr/share/php/PEAR/Command/Config.xml
/usr/share/php/PEAR/Command/Install.php
/usr/share/php/PEAR/Command/Install.xml
/usr/share/php/PEAR/Command/Mirror.php
/usr/share/php/PEAR/Command/Mirror.xml
/usr/share/php/PEAR/Command/Package.php
/usr/share/php/PEAR/Command/Package.xml
/usr/share/php/PEAR/Command/Pickle.php
/usr/share/php/PEAR/Command/Pickle.xml
/usr/share/php/PEAR/Command/Registry.php
/usr/share/php/PEAR/Command/Registry.xml
/usr/share/php/PEAR/Command/Remote.php
/usr/share/php/PEAR/Command/Remote.xml
/usr/share/php/PEAR/Command/Test.php
/usr/share/php/PEAR/Command/Test.xml