Lommeregner, select problem.

<?
if(isset($_POST[udregn])){
$tal1  = $_REQUEST["tal1"];
$tal2  = $_REQUEST["tal2"];
$type  = $_REQUEST["type"];
$tegn1 = $tal1 + $tal2;
$tegn2 = $tal1 - $tal2;
$tegn3 = $tal1 * $tal2;
$tegn4 = $tal1 / $tal2;
$tegn5 = $tal1 / 100 * $tal2;

if($type == tegn1) {
    echo "$tal1 + $tal2 = $tegn1";
  } elseif ($type == tegn2) {
    echo "$tal1 - $tal2 = $tegn2";
  } elseif ($type == tegn3) {
    echo "$tal1 * $tal2 = $tegn3";
  } elseif ($type == tegn4) {
    echo "$tal1 / $tal2 = $tegn4";
  } elseif ($type == tegn5) {
    echo "$tal1 % af $tal2 = $tegn5";
  }
print"<br><br>";
}
?>

<form action="#" method=post>
<input type="text" name="tal1" size="5" value="<?php echo $tal1; ?>">
<select name="type">
<option value="tegn1">+
<option value="tegn2">-
<option value="tegn3">*
<option value="tegn4">/
<option value="tegn5">%
</select>
<input type="text" name="tal2" size="5" value="<?php echo $tal2; ?>">
<input type="submit" name="udregn" value="udregn">
</form>

Måske?
<form action="#" method=post>
<input type="text" name="tal1" size="5" value="<?php echo $tal1; ?>">
<select name="type">
<option <? if($_POST['type'] == "tegn1"){ echo "selected"; } ?> value="tegn1">+
<option <? if($_POST['type'] == "tegn2"){ echo "selected"; } ?> value="tegn2">-
<option <? if($_POST['type'] == "tegn3"){ echo "selected"; } ?> value="tegn3">*
<option <? if($_POST['type'] == "tegn4"){ echo "selected"; } ?> value="tegn4">/
<option <? if($_POST['type'] == "tegn5"){ echo "selected"; } ?> value="tegn5">%
</select>
<input type="text" name="tal2" size="5" value="<?php echo $tal2; ?>">
<input type="submit" name="udregn" value="udregn">
</form>

Du kan vel bruge et array.

$tal1 = $_REQUEST['tal1'];
$tal2 = $_REQUEST['tal2'];
$type = $_REQUEST['type'];

$select = array(
'+'=>'plus',
'-'=>'minus',
'*'=>'gange',
'/'=>'divid',
'%'=>'proce'
);

switch( $type ):
case 'plus':
  $res = $tal1+$tal2;
  break;
case 'minus':
  $res = $tal1-$tal2;
  break;
case 'gange':
  $res = $tal1*$tal2;
  break;
case 'divid':
  $res = $tal1/$tal2;
  break;
case 'proce':
  $res = ($tal1/100)*$tal2;
  break;
endswitch;


<form action="#" method=post>
<input type="text" name="tal1" size="5" value="<?php echo $tal1; ?>">
<select name="type">
foreach( $select AS $print => $val )
{
echo '<option value="' . $val . '" ';
if( $type == $val )
{
  echo 'selected';
}
echo '>' . $print . '</option>';
}
<form action="#" method=post>
<input type="text" name="tal1" size="5" value="<?php echo $tal1; ?>">
<select name="type">

$tal1 = $_REQUEST['tal1'];
$tal2 = $_REQUEST['tal2'];
$type = $_REQUEST['type'];

$select = array(
'+'=>'plus',
'-'=>'minus',
'*'=>'gange',
'/'=>'divid',
'%'=>'proce'
);

switch( $type ):
case 'plus':
  $res = $tal1+$tal2;
  break;
case 'minus':
  $res = $tal1-$tal2;
  break;
case 'gange':
  $res = $tal1*$tal2;
  break;
case 'divid':
  $res = $tal1/$tal2;
  break;
case 'proce':
  $res = ($tal1/100)*$tal2;
  break;
endswitch;


<form action="#" method=post>
<input type="text" name="tal1" size="5" value="<?php echo $tal1; ?>">
<select name="type">
foreach( $select AS $print => $val )
{
echo '<option value="' . $val . '" ';
if( $type == $val )
{
  echo 'selected';
}
echo '>' . $print . '</option>';
}
echo '</select>';

Det virkede, mange tak.

Brugte zynzz metode

Men så lægger jeg lige et svar, men syntes nu også zurekk skulle lægget et svar...