PDO lastInsertId() always return 0

Question

I\'ve come across with a problem. My framework was working just fine with PHP 5.3.0. I upgraded my PHP version to PHP 5.4.x and I started to have few issues with some parts

Answer 1

The one other problem could be using $pdo->exec($sql) instead of $pdo->query($sql).

exec($sql) will return always 0 when you use $pdo->lastInsertId(). So use query() instead.