Yeppers, what I mean though is that your old configuration would also have the same errors, but the reporting wasn't set to include E_NOTICE.
I'm not sure what's sadder actually, the amount of what I know when I look through the manual, or what it is I *don't* have memorized O.o. There's just so much to this language.
As of PHP 5.5, the MySQL library has been officially deprecated. It is recommended to move to either MySQLi or PDO libraries for your mysql connectivity. See here for help choosing which interface you prefer: http://php.net/manual/en/mysqlinfo.api.choosing.php