Question

Why?

try{

    $st = $this->prepare("INSERT INTO thetable (a,b) VALUES (?,?)");
    $st->execute(array(5,5));

    $id = $this->lastInsertId();

    echo $id;            // nothing 
    echo gettype($id);   // string

    return $id;          // and I get NULL returned, this is even weirder...

}catch(PDOException $e){
    die($e);
    return false;
}

The table has an id column which has auto increment. Why don’t I get the id value?

Answer 1

instead of

$this->lastInsertId();

have you tried

$st->lastInsertId();