Custom Headers in PHP SQL Query - php

Question

I have an html form that calls a php document on submit that downloads the values of a table as a csv file. My goal is to utilize the "as" within the select statement to achieve custom column headers within that document. For example, I would like to select tableNAME.address and print to the csv as "Site Location".
Here is a sample of the php along with a postgres query:
<?php
// show error messages
ini_set('error_reporting', E_ALL);
ini_set("display_errors", 1);
if( !empty($_SERVER['REQUEST_METHOD']) && (strcasecmp($_SERVER['REQUEST_METHOD'], 'post')===0) ) {
// Create connection
$conn = pg_connect("host=MYHOST port=ACCESS dbname=DBNAME user=USERNAME password=PWORD");
// Check connection
if (!$conn) {
echo "Did not connect.\n";
exit;
}
$result = pg_query($conn,
"
SELECT
tableNAME.address AS Address,
tableNAME.city AS City,
tableNAME.state_1 AS State,
-- adds 0's if zip code is not long enough
case length(tableNAME.zip)
WHEN 5 THEN tableNAME.zip
WHEN 4 THEN '0' || tableNAME.zip
WHEN 3 THEN '00' || tableNAME.zip
END AS Zip
FROM
db.tableNAME
WHERE
tableNAME.in_process = 'true' and
tableNAME.shippiing = 'false' and
tableNAME.soft_delete_id = '0' and
tableNAME.status_1 <> 'Closed' and
tableNAME.return_shipment = 'true'
ORDER BY
tableNAME.site_id asc;");
if (!$result) {
echo "Query failed.\n";
exit;
}
$num_fields = pg_num_fields($result);
$headers = array();
for ($i = 0; $i < $num_fields; $i++)
{
$headers[] = pg_field_name($result , $i);
}
$fp = fopen('php://output', 'w');
if ($fp && $result)
{
header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="ups_returns.csv"');
header('Pragma: no-cache');
header('Expires: 0');
fputcsv($fp, $headers);
while ($row = pg_fetch_row($result))
{
fputcsv($fp, array_values($row));
}
die;
}
exit('It works');
}
?>
I have tried different variations on using apostrophe's within the select as statement. For example...
tableNAME.address as '""Site Location""'
tableNAME.address as 'Site Location'
tableNAME.address as '"Site Location"'
None of these have worked... I believe the line of my code that may need to be altered is:
$headers = array();
However, I have no idea what I can do to make it work.
Thanks

Answer 1

I have found a resolution... Instead of using data from the query to determine headers I set them manually.
$headers = array('Site Location','City','State','Zip','Package Type','Weight','ShippingCode','TicketNumber','ReturnService','Return','BillTo','Attention','SiteID','PrintLabel');
//for ($i = 0; $i < $num_fields; $i++)
//{
// $headers[] = pg_field_name($result , $i);
//}