Rar::getName() returns full name of the archive entry.
Example 1. Rar::getName() example
<?php
$rar_file = rar_open('example.rar') or die("Failed to open Rar archive");
$entry = rar_entry_get($rar_file, 'Dir/file.txt') or die("Failed to find such entry");
echo "Entry name: " . $entry->getName();
?>