php - mysqli_result not working converting mysql to mysqli

i am converting my old mysql to mysqli but ran into this problem mysqli result does not work.looked on the internet and i founded out that it function had been change,for mysqli result is there a equivalent out here?

thank

here my error

Fatal error: Call to undefined function mysqli_result() in C:\xampp\htdocs\bear_mysqli\functions\users.php on line 153 

    function user_exists($con,$username)
    {
    $username = sanitize($con,$username);

    $query = mysqli_query($con,"SELECT COUNT(`user_id`)FROM `users` WHERE `username` = '$username'");

    return (mysqli_result ($query, 0)== 1) ? true : false;


    }