pg_port

<?php         $a['last error'] = pg_last_error($link);

        $a['last notice'] = pg_last_notice($link);

        $a['host'] = pg_host($link);

        $a['port'] = pg_port($link);

        $a['dbname'] = pg_dbname($link);

        $a['options'] = pg_options($link);

        $a['version'] = pg_version($link);