Ajax submit result opens in admin-ajax.php

You’re not passing the event object in your submit function, so e.preventDefault(); doesn’t stop the form from being submitted.

$('#form_id').submit(function(e) { // <--- event object 'e'
    e.preventDefault();

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)