$last_id = $this->db->$insert_id(); in php code example

Example: last_insert_id() php

<?php
// use mysql_insert_id():
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) { die('Impossible de se connecter : ' . mysql_error()); }
mysql_select_db('mydb');
mysql_query("INSERT INTO mytable (product) values ('something')");
printf("last inserted id is %d\n", mysql_insert_id());
?>