<?
 include "DBconnect.inc"; // meine SQL classe
 $Count = 0;

 $Test = new SQLClass('datenbank','server');
 $Test->User = 'username';
 $Test->Pass = 'passwort';
 $Test->Connect();
 $RS = $Test->SQL('SELECT myFiled FROM myTable');
 $zeile = mysql_fetch_row($RS);
 $Count = $zeile[0];

 $Count++;
 mysql_free_result($RS);

 $Command = "UPDATE myTable SET myField=$Count WHERE myField=$zeile[0]";
 $RS = $Test->SQL($Command);

 $Test->DisConnect();
?>