<?php
$db = mdb_open("test.mdb");
print_r(mdb_tables($db, true /* include system tables */))
mdb_close($db);
?>
Array ( [0] => MSysObjects [1] => MSysACEs [2] => MSysQueries [3] => MSysRelationships [4] => MSysModules2 [5] => MSysModules [6] => Cities [7] => Provinces )