I think I get a nice solution in Postgres to get the ID using the RETURNING that comes with Postgress since version 8.2. In the example below, I add to my insert clause the "returning" along with the primary key of my table, then after the execute, I do a fetch getting an array with the value of the last inserted id.
<?php
public function insert($employee){
$sqlQuery = "INSERT INTO employee(user_id,name,address,city) VALUES(:user_id,:name,:address,:city) RETURNING employee_id";
$statement = $this->prepare($sqlQuery);
$a ="2002-03-11 12:01AM" ;
$statement->bindParam(":user_id", $employee->getUserId(), PDO::PARAM_INT);
$statement->bindParam(":name", $employee->getName(), PDO::PARAM_STR);
$statement->bindParam(":address", $employee->getAddress(), PDO::PARAM_STR);
$statement->bindParam(":city", $employee->getCity(), PDO::PARAM_STR);
$statement->execute();
$result = $statement->fetch(PDO::FETCH_ASSOC);
return $result["employee_id"];
}
?>