How can I force jQuery Validate to check for duplicate username in database?

Question

I\'m coming into the middle of this project so I\'m having to do a bit of re-writing because of sloppy code. I am using jQuery 1.6.1 and Validate 1.8.1.

First, here\

Answer 1

I faced the same problem, But I find the easiest solution just return true or false after encoding into json through php.

if ($users->username_exists())
{
    echo json_encode(FALSE);
}else{
    echo json_encode(TRUE);
}