Using a selection from a drop down menu

[emnawroc]

I am creating a RSS feed display. I need to be able to select a number from a drop down box and use it to display that number of feeds.
I guess i am unsure of where to put the requested tag.

<?php
$site_err = NULL;
$my_num = 25; //sets num to 25 by default
$num = NULL;
?>

<form method="post" action="feed_rss.php">
    <label for="site">URL:</label>
    <input type="text" name="site" id="site" />
    <?php
    if($site_err != NULL){
        echo "<span class = \"error\">$site_err</span>";
    }
    ?>
    <br />


    <label for='num'>Num of Feeds:</label>
    <select name='num'>
        <option value="1">1</option>
        <option value="2">2</option>
        <option value="3">3</option>
        <option value="4">4</option>
        <option value="5">5</option>
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
        <option value="9">9</option>
        <option value="10">10</option>
        <option value="11">11</option>
        <option value="12">12</option>
        <option value="13">13</option>
        <option value="14">14</option>
        <option value="15">15</option>
        <option value="16">16</option>
        <option value="17">17</option>
        <option value="18">18</option>
        <option value="19">19</option>
        <option value="20">20</option>
        <option value="21">21</option>
        <option value="22">22</option>
        <option value="23">23</option>
        <option value="24">24</option>
        <option value="25">25</option>
    </select>
    <br />

    <label for="sort">Sort:</label>
    <select name="sort">
        <option value="Ascending">Ascending</option>
        <option value="Descending">Descending</option>
        <option value="Random">Random</option>

    </select>
    <br />

    <input type="submit" name="submit" value="Submit" class="submit-button" />
</form>

<!--Logic    -->


<!--http://www.engadget.com/rss.xml-->
<?php
$rss = simplexml_load_file($_POST['site']);
?>

<h1><?php echo $rss->channel->title; ?></h1>
<ul>

<?php
    $variable=$_REQUEST['num'];
    for ($x = 0; $x < $variable; $x++)
        foreach($rss->channel->item as $chan) {
            echo "<li><a href=\"".$chan->link."\">";
            echo $chan->title;
            echo "</a></li>\n";
            }

?>

[Rabbit]

I don't know what you mean when you say "where to put the requested tag". Define tag. What tag are you talking about? What line of code are you referencing?

[emnawroc]

I switched it up a bit to use an input box instead of a drop down. But i need to print the number of rss feeds from an inserted url based on the number they enter into the text box if that makes sense. I think I was more or less talking about line 72, but after doing a little more editing, i'm not sure that is what i needed to use. I have ended up using $_POST and I think i have figured it out myself. but thanks for the reply

[Rabbit]

Please post your solution so that if someone else has the same problem, they can benefit from your solution.