If you’re using PDO, use PDO::lastInsertId
.
If you’re using Mysqli, use mysqli::$insert_id
.
If you’re still using Mysql:
Please, don’t use
mysql_*
functions in new code. They are no longer maintained and are officially deprecated. See the red box? Learn about prepared statements instead, and use PDO or MySQLi – this article will help you decide which. If you choose PDO, here is a good tutorial.
But if you have to, use mysql_insert_id
.