Get last insert id after a prepared insert with PDO

Question

I'm using PHP PDO with PostgreSQL for a new project.

Given the following function, how can I return the id of the row just inserted? It doesn't work the way it looks now.

function adauga_administrator($detalii) {     global $db;     $ultima_logare = date('Y-m-d');      $stmt = $db->prepare("INSERT INTO site_admins (sa_nume, sa_prenume, sa_user_name, sa_password, sa_email, sa_id_rol, sa_status, sa_ultima_logare) VALUES (?, ?, ?, ?, ?, ?, ?, ?)");     $stmt->bindParam(1, $detalii['nume']);     $stmt->bindParam(2, $detalii['prenume']);     $stmt->bindParam(3, $detalii['username']);     $stmt->bindParam(4, md5(md5($detalii['parola'] . SIGURANTA_PAROLE) . SIGURANTA_PAROLE));     $stmt->bindParam(5, $detalii['email']);     $stmt->bindParam(6, $detalii['rol'], PDO::PARAM_INT);     $stmt->bindParam(7, $detalii['status'], PDO::PARAM_INT);     $stmt->bindParam(8, $ultima_logare);         $stmt->execute();       $id = $db->lastInsertId();     return $id; } 

Answer 1

From the Manual:

Returns the ID of the last inserted row, or the last value from a sequence object, depending on the underlying driver. For example, PDO_PGSQL() requires you to specify the name of a sequence object for the name parameter.

It should be something like:

return $db->lastInsertId('yourIdColumn'); 

[EDIT] Update link to doc

Answer 2

From the PHP manual:

For example, PDO_PGSQL() requires you to specify the name of a sequence object for the name parameter.

You could also use RETURNING in the INSERT-statement and fetch the INSERT-result like a SELECT result.