Hvordan?

$sum = eval($resultat);
echo $sum;

øhh? hvordan det?

Hmmm ...

<form action=\"ialt.php3\" method=post>

<input type=\"tal\" name=\"tal\">

<select name=\"tests\">
<option value=\"+\">+</option>
<option value=\"-\">-</option>
</select>

<input type=\"tal2\" name=\"tal2\">

<br><br><br>

resultat<input type=\"text\" name=\"resultat\" value=\"<? echo $tal, $tests, $tal2; ?>\">

<br>

<br><br>

Sidste regnestykke:
<?

$resultat = \"$tal $tests $tal2\";
$sum = eval($resultat);
echo $sum;

?>

<br><br>
<input type=submit value=\"TAK :-)\">

</form>

Hmmm det var sgu da ikke testet - her kommer den version der dur:

<form action=\"ialt.php\" method=post>

<input type=\"tal\" name=\"tal\">

<select name=\"tests\">
<option value=\"+\">+</option>
<option value=\"-\">-</option>
</select>

<input type=\"tal2\" name=\"tal2\">

<br><br><br>

resultat<input type=\"text\" name=\"resultat\" value=\"<? echo $tal, $tests, $tal2; ?>\">

<br>

<br><br>

Sidste regnestykke:

<?

$tekst = \"$tal $tests $tal2\";
$resultat = \'$tal = \'.\"$tal $tests $tal2;\";
eval(\"$resultat;\");

echo \"<BR><BR>$tekst =<BR>\";
echo \"$tal<BR>\";

?>

<br><br>
<input type=submit value=\"TAK :-)\">

</form>