Ako automaticky číslovať?

Poraďte amatérovi, ako dostať do scriptu automatické číslovanie položiek (riadkov v tabuľke a v grafe) v tomto scripte (na pozícii "cislo"):

<form action="" method="post">
<fieldset>
<legend>TABUĽKA</legend>
<table width="500">
<tr><td>Názov</td><td>Suma</td></tr>
<tr><td><input name="nadpis" size="20"></td><td><input name="suma" style="align="right"></td></tr>
</table>
</fieldset>

<fieldset>
<table width="500">
<legend></legend>
<tr><td><input type="submit" name="show" value="Zobrazi?"></td><td><input type="submit" name="save" value="Uloži?"></td></tr>
</table>
</fieldset>
<form>

<?

if($show) {

$soubor1 = "tabulka.dat";
$wpolozka1 = "<tr><td>cislo</td><td>$nadpis</td><td align=\"right\">$suma $ext</td></tr>";
$write = "$wpolozka1";
if (File_Exists ($soubor1)) {
$fp = FOpen ($soubor1, "r");
FClose($fp);
}
$fp = FOpen ($soubor1, "a+");
FWrite ($fp, $write.$data);
FClose ($fp);


$soubor2 = "graf.dat";
$wpolozka2 = "<tr><td>cislo</td><td><img src=\"01.gif\" height=\"25\" width=\"$suma\"></td></tr><tr><td align=\"left\">$suma $ext</td></tr>";
$write = "$wpolozka2";
if (File_Exists ($soubor2)) {
$fp = FOpen ($soubor2, "r");
FClose($fp);
}
$fp = FOpen ($soubor2, "a+");
FWrite ($fp, $write.$data);
FClose ($fp);
}
?>
<?
echo "<table width=\"$box_width\" style=\"border:1px solid black\">";
include("tabulka.dat");
echo "</table>";
echo "<hr width=\"$box_width\" align=\"left\">";
echo "<table width=\"$box_width\" padding=\"$padding\" style=\"border:1px solid black\">";
include("graf.dat");
echo "</table>";
?>