No graphical side to PHP script - php

Question

So I have this piece of code here I got off the internet, it's supposed to export data from mySQL database to an excel file.
The thing is that how am I supposed to trigger this? There's no graphical side of this, no button to trigger the script, nothing.
How can I make it work?
<?PHP
// Original PHP code by Chirp Internet: www.chirp.com.au
// Please acknowledge use of this code by including this header.
include('config.php');
function cleanData(&$str)
{
$str = preg_replace("/\t/", "\\t", $str);
$str = preg_replace("/\r?\n/", "\\n", $str);
if(strstr($str, '"')) $str = '"' . str_replace('"', '""', $str) . '"';
}
// filename for download
$filename = "website_data_" . date('Ymd') . ".xls";
header("Content-Disposition: attachment; filename=\"$filename\"");
header("Content-Type: application/vnd.ms-excel");
$flag = false;
$result = pg_query("SELECT * FROM norse5_proov ORDER BY id") or die('Query failed!');
while(false !== ($row = pg_fetch_assoc($result))) {
if(!$flag) {
// display field/column names as first row
echo implode("\t", array_keys($row)) . "\r\n";
$flag = true;
}
array_walk($row, 'cleanData');
echo implode("\t", array_values($row)) . "\r\n";
}
exit;
?>

Answer 1

Here's some code that works for me in a commercial app;
if($_REQUEST["EXCEL"]){
header("Content-Type: application/excel");
header("Content-Disposition: attachment; FileName=assets.xls");
header("Cache-Control: private");
header("Content-Length: ".strLen($data));
echo $data;
exit;
}
The $data is tab delimited text, but the excel headers open Excel and imports the text