Otomatis get ID Admin

<?php

             $host = 'localhost';
             $user = 'root';
             $pass = '';

             mysql_connect($host, $user, $pass);


            $sql    = 'select count(*) as jml from table ';
            $query  = mysqli_query($db_link,$sql);
            while($data = mysqli_fetch_array($query))
            {
                $jml    =$data['jml'];

            }

            $jml_new=$jml + 1;


            $sql    = 'insert into table (id) values("'.$jml_new.'"';
            $query  = mysqli_query($db_link,$sql);

?>