[PHP] Config and Functions !

[cremes]

Hi.

i have problem. i got in config and function set encryption to "plain" and my passwords in database are sha1.
when i change it for :

//return password to db
function password_ency($password)
{
$ency = $GLOBALS['config']['server']['encryptionType'];
if($ency != 'sha1')
return hash($ency, $password);
elseif($ency == 'sha1')
return $password;

i cant login to my acc, so i try create new account. and i saw in my mysql database password is normal plain...

some1 can me where is my fault ?