Please make sure you have different variable names

<?php $do = $_GET['do']; $items = $_POST['num_items']; $rad = $_POST['rad']; if($do=="send"){ if($rad=="cmb"){ echo "<form action='cmb.php' method='post'>";<br /> echo "<select name='sel' >";<br /> <br /> for($cnt = 1; $cnt<=$items; $cnt++){ echo "<option value".$cnt.">".$cnt."</option>" ;<br /> }<br /> echo "</select><br /> <input type='submit' value='submit' /><br /> </form>";<br /> }<br /> else if($rad=="rad"){<br /> <br /> echo "<form action='rad.php' method='post'>";<br /> for($cnt = 1; $cnt<=$items; $cnt++){ echo "<input type='radio' name='rad2' value=".$cnt." />".$cnt."<br>";<br /> }<br /> echo "<input type='submit' value='submit' /><br /> </form>";<br /> <br /> }<br /> }<br /> else{?><br /> <form action="labquiz-2.php?do=send" method="post"><input type="text" name="num_items" /><br /> <br /><br /><br /> <input type="radio" name="rad" value="cmb" /> Checkbox<br /> <br /><br /> <input type="radio" name="rad" value="rad" /> Radio<br /> <br /><br /> <input type="submit" value="submit" /><br /> <br /> </form><br /> <?php } ?>


save to another php file for radio
<? $value = $_POST['rad2']; echo "Your Value is ".$value; ?>

//?

$value = $_POST['sel'];

echo "Your Value is ".$value;

?>