PHP - update csv file when page is load - php

I'm trying to create a PHP page that opens the query and automatically updates the csv file with a new value.
I disc location I have file "graph.csv" with date, and COUNT from SQL Query.
I try open this file and add new row everytime when page is loaded. But, currently browser try save and overwrite file manual. php and csv file are in the same location.
<?php
$connect = oci_connect("login","pass","db");
header('Content-Type: text/csv; charset=utf-8');
header('Content-Disposition: attachment; filename=graph.csv');
$output = fopen("php://output", "w");
fputcsv($output, array('TIME','Orders'));
$query = "SELECT column1, column2 FROM table1";
$result = oci_parse($connect, $query);
$r=oci_execute($result);
while ($row = oci_fetch_array($result, OCI_BOTH))
{
$handle = fopen("graph.csv", "a");
$handle = fputcsv($output, $row);
}
$handle = fclose($output);
?>

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Extract data from database to text file with PHP [Codeigniter]

I have this code
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Edit #1
I found a solution and this is the new working code
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$dataContent = array();
$i = 0;
foreach($data->result() as $dat){
$i++;
$dataContent[$i] = "USERNAME| ".$dat->user." / DATA| ".$dat->values_text.".\n";
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header('Content-Type: application/text');
header('Content-Disposition: attachment; filename="'.$dateFile);
echo file_get_contents($dateFile);
Try this code:
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Hope this will help you

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If CSV is enough for you, there are fputcsv available since 5.1 and you can stream file data directly to the user agent.
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