PDO get the last ID inserted

Question

I have a query, and I want to get the last ID inserted. The field ID is the primary key and auto incrementing.

I know that I have to use this statement:

Answer 1

That's because that's an SQL function, not PHP. You can use PDO::lastInsertId().

Like:

$stmt = $db->prepare("...");
$stmt->execute();
$id = $db->lastInsertId();

If you want to do it with SQL instead of the PDO API, you would do it like a normal select query:

$stmt = $db->query("SELECT LAST_INSERT_ID()");
$lastId = $stmt->fetchColumn();