zend framework update db not work

Question

I wanna update a table by using this update commands but nothing happend. anybody knows why ?!

$db = Zend_Registry::get('db');
$updateData = array(
'user_type' => 0
);
$updateWhere = array(
'username = ?' => 'admin'
);
$res = $db->update('phpbb3_users', $updateData, $updateWhere);

Answer 1

As this code is working for me to update

$updateData = array(
'user_type' => 0
);
        $updateWhere = array(
'username' => 'admin'
);          

or

  $updateWhere = "username = 'admin'";  
            $db->update('phpbb3_users', $updateData, $updateWhere);

hope it will sure solve your issue