Vedere record database in un radio button

[oly1982]

<?php
$sex_prelevato_da_db = 1;

$check0 = '';
$check1 = '';
switch($sex_prelevato_da_db)
    {
    case 0:
        $check0 .= ' checked="checked"';
    case 1:
        $check1 .= ' checked="checked"';
    }

echo '
        Maschile:<input type="radio" name="sex" value="0"'.$check0.'>
 
        Femminile:<input type="radio" name="sex" value="1"'.$check1.'>
';
?>