mysql_inserted_id() in PEAR:DB

[hpman28]

Suppose I got this function:

    /**
    * @return void
    * @param Data Array $array
    * @desc creates static content item
    */
    function createItem($array) {
        global $db;
        $db -> autoExecute('trips_ads', $array, DB_AUTOQUERY_INSERT);
        return mysql_insert_id();
    } 

How do I change the return mysql_insert_id() to $db -> showthing?
I couldn't find it. and I didn't understand how to use the nextId()

[ultk]

run a query with "select last_insert_id()" and fetch the result.

The pear:B nextId is even less multi user/page proof than the last_insert_id so you'd be better off with last_insert_id but it works.