php and radiobutton

.php

$radio = '$_POST[rosta]';

if ($radio == 'a')
{
$query = "insert into fragor values(1, 2, 3)";
mysql_query($query, $link);
}
else if ($radio == 'b')
{
$query = "insert into fragor values(1, 2 ,3)";
mysql_query($query, $link);
}

.html

<input type="radio" name="rosta" value="a">
<input type="radio" name="rosta" value="b">


it doesn't write the valuse in to the database, why?

the name of the radio button is rosta not radio. change:

if ($radio == 'a')

to:

if ($rosta == 'a')

also change other if stament.

Actually, even tho the name of the radio button is rosta, that's not the problem. The code was trying to set $radio equal to the value of the radio button named 'rosta', which is just fine. However,

$radio = '$_POST[rosta]';

is not correct.

try this..

$radio = $_POST['rosta'];

see the difference? the way you had it, the post variables would not have been returned.