Call database results into loop Twenty Ten

Really stupid, but I can′t figure it out.

I have two files. One is the form

<div id="container">
<div id="content" role="main">

<form action="/vitamine/wp-content/themes/twentyten/insert.php" method="post">
Value1: <input type="text" name="value1"><br>
<input type="Submit">
</form>

</div><!-- #content -->
</div><!-- #container -->

<?php get_footer(); ?>

and the other one is insert.php to get the results

<?php
$username="root";
$password="";
$database="vitaminen";

mysql_connect(localhost,$username,$password);
@mysql_select_db($database) or die( "Unable to select database");
$query="SELECT Shrt_Desc, Vit_D_mcg, Water, Energ_Kcal, Protein, Lipid_Tot, Carbohydrt FROM abbrev WHERE Shrt_Desc LIKE '%".mysql_real_escape_string($_POST['value1'])."%' ORDER BY Vit_D_mcg DESC ";
$result=mysql_query($query) or die("could not execute query: " . mysql_error());
while ($row=mysql_fetch_array($result)) {
$results .= '<tr>
<td>' . $row['Shrt_Desc'] . '</td>
<td>' . $row['Vit_D_mcg'] . '</td>
<td>' . $row['Water'] . '</td>
<td>' . $row['Energ_Kcal'] . '</td>
<td>' . $row['Protein'] . '</td>
<td>' . $row['Lipid_Tot'] . '</td>
<td>' . $row['Carbohydrt'] . '</td>
</tr>';
}
mysql_close();
//
if ($results) {
echo "<table border=\"1\" align=\"center\" cellpadding=\"2\" cellspacing=\"2\">
<tr><td>NAME</td><td>Vit D mcg</td><td>Water</td><td>Energy</td><td>Protein</td><td>Fat</td><td>Carbohydrate</td></tr>
$results
</table>
";
}
else { echo "<p>No results were found with that search.</p>"; }
?>

I want the results showing up in the WordPress Twenty Ten theme, but whatever I do, I can′t get further than having the results on a blank page.

I tried

<?php
$username="root";
$password="";
$database="vitaminen";

mysql_connect(localhost,$username,$password);
@mysql_select_db($database) or die( "Unable to select database");
$query="SELECT Shrt_Desc, Vit_D_mcg, Water, Energ_Kcal, Protein, Lipid_Tot, Carbohydrt FROM abbrev WHERE Shrt_Desc LIKE '%".mysql_real_escape_string($_POST['value1'])."%' ORDER BY Vit_D_mcg DESC ";
$result=mysql_query($query) or die("could not execute query: " . mysql_error());
while ($row=mysql_fetch_array($result)) {
$results .= '<tr>
<td>' . $row['Shrt_Desc'] . '</td>
<td>' . $row['Vit_D_mcg'] . '</td>
<td>' . $row['Water'] . '</td>
<td>' . $row['Energ_Kcal'] . '</td>
<td>' . $row['Protein'] . '</td>
<td>' . $row['Lipid_Tot'] . '</td>
<td>' . $row['Carbohydrt'] . '</td>
</tr>';
}
mysql_close();
//
if ($results) {

get_header(); ?>

<div id="container">
<div id="content" role="main">

<?php
echo "<table border=\"1\" align=\"center\" cellpadding=\"2\" cellspacing=\"2\">
<tr><td>NAME</td><td>Vit D mcg</td><td>Water</td><td>Energy</td><td>Protein</td><td>Fat</td><td>Carbohydrate</td></tr>
$results
</table>
";
}
else { echo "<p>No results were found with that search.</p>"; }
?>

</div><!-- #content -->
</div><!-- #container -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>

but that gives me this error:
Fatal error: Call to undefined function get_header() in C:\xampp\htdocs\test\wp-content\themes\twentyten\insert.php

How can I embed the results in the Twenty Ten layout?
Thanks