/usr/share/php/smarty/internals/ is in smarty 2.6.26-0.2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/smarty/internals/core.assemble_plugin_filepath.php
/usr/share/php/smarty/internals/core.assign_smarty_interface.php
/usr/share/php/smarty/internals/core.create_dir_structure.php
/usr/share/php/smarty/internals/core.display_debug_console.php
/usr/share/php/smarty/internals/core.get_include_path.php
/usr/share/php/smarty/internals/core.get_microtime.php
/usr/share/php/smarty/internals/core.get_php_resource.php
/usr/share/php/smarty/internals/core.is_secure.php
/usr/share/php/smarty/internals/core.is_trusted.php
/usr/share/php/smarty/internals/core.load_plugins.php
/usr/share/php/smarty/internals/core.load_resource_plugin.php
/usr/share/php/smarty/internals/core.process_cached_inserts.php
/usr/share/php/smarty/internals/core.process_compiled_include.php
/usr/share/php/smarty/internals/core.read_cache_file.php
/usr/share/php/smarty/internals/core.rm_auto.php
/usr/share/php/smarty/internals/core.rmdir.php
/usr/share/php/smarty/internals/core.run_insert_handler.php
/usr/share/php/smarty/internals/core.smarty_include_php.php
/usr/share/php/smarty/internals/core.write_cache_file.php
/usr/share/php/smarty/internals/core.write_compiled_include.php
/usr/share/php/smarty/internals/core.write_compiled_resource.php
/usr/share/php/smarty/internals/core.write_file.php