first - you select records (in fact, very probably only *one* record that has the userid $username).
i'm pretty sure you only have one row with that userid.
second - then you go over that row(s) and compare $username to the fetched userid. don't
you trust your database? for what reason do you do a 'where userid = ?' anyway?
third - you're preparing $sth and execute $usr - a mistake?
my $sth = $db->prepare( q{SELECT userid, password from user where user
+id = ?} ) or die $dbh->errstr;
$sth->execute($username) or die $dbh->errstr;
my ($uid, $pass) = $sth->fetchrow_array;
if ($pass ne $hashPassword) {
error();
}
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