Controllo campi: questo script è ovunque in rete ma non funziona!

[cubalibre810]

Così?!?

function account_namevalid($name) {  
           if (eregi("^((root)|(bin)|(daemon)|(adm)|(lp)|(sync)|(shutdown)|(halt)|(mail)|(news)|(uucp)|(operator)|(games)|(mysql)|(httpd)|(nobody)|(dummy)|(www)|(cvs)|(shell)|(ftp)|(irc)|(debian)|(ns)|(download))$", $name))
           {
    return false;
  }
  if (eregi("^(anoncvs_)", $name)) {
    return false;
  }

return true;
}

        $name = "prova";
        if (account_namevalid($name) === true) echo "

 NO ERRORE </p>";
        else  echo "

ERRORE </p>";

?>