Broder

надо переписывать код и выкидывать mysql_result, mysql_query, mysql_fetch_assoc, mysql_num_rows
https://www.php.net/manual/en/function.mysql-query.php

Warning
This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide. Alternatives to this function include:

меняйте на mysqli или pdo