Accedere al database sql

[dvds]

         $result = $db->sql_query("SELECT * FROM ".$prefix."_users WHERE userid='$userid'");
         $row = $db->sql_fetchrow($result);

         echo "<center><font class=\"title\">".CAMBIA." ".LE." ".TUE." ".INFORMAZIONI."</font></center>
\n";
         echo "<center>".Campi." ".obbligatori."
               <form name=\"EditMyInfoForm\" method=\"POST\" action=\"users.php\">
               <table align=\"center\" border=\"1\" width=\"400\" id=\"table1\" cellpadding=\"2\" bordercolor=\"#C0C0C0\">
        <tr>
            <td  width=\"100\" align=\"right\">".Usermane." :</td>
            <td><input type=\"text\" disabled=\"true\" name=\"username\" size=\"18\" value=\"$row[username]\"></td> 

No ma seriamente... che droghe sono state usate?