Use HTML dropdownlist made in PHP with data from MySQL database

I have a PHP script which connects to a MySQL database and creates an HTML dropdown list with data retrieved from it. The script works, I just don't understand how I'm supposed to use it in an HTML form.

The PHP script, named CountryList.php, looks like this:

<?php
function createCountryList() {
    $con = mysql_connect("localhost","user","pass");
    mysql_select_db('database', $con);

    $sql="SELECT Country FROM CountryList";
    $result = mysql_query($sql,$con);

    echo "<select name=country value=''>Country</option>";
    echo "<option value=0>Select Country</option>";
    echo "<option value=1></option>";

    $curvalue=2;
    while($nt=mysql_fetch_array($result)){
        echo "<option value=$curvalue>$nt[Country]</option>";
        $curvalue = $curvalue+1;
    }
    echo "</select>"; 
    mysql_close($con);
}
?>

I tried including the PHP file in the head of the HTML page with:

<?php include("CountryList.php"); ?>

And then I tried calling the function which creates the dropdown menu in a form later on:

<form action="insert.php" method="POST">
<label>Which country are you from?</label>
<?php createCountryList(); ?>
</form>

Since nothing happens, I did it wrong. Any advice? Help is appreciated.

EDIT: Bah, I knew it was something silly. The page was an HTML file, PHP didn't process it. Changing the HTML file to PHP solved everything.