create a bibtex archive with PHP - php

Question

I'm trying to create a code that, based on informations from BD, creates a bibtex archive. That's what I got:
<?php
include("classe/conexao.php");
session_start();
$_SESSION[id_tese_especifica] = $_GET['id'];
$result = pg_query("SELECT titulo, id, data, autor_nome FROM teses ORDER BY data DESC");
$arr = pg_fetch_array($result);
echo "#phdthesis{phpthesis,
author={" . $arr[0] . "},
title={" . $arr[6] . " " . $arr[3] . "},
month={" . $arr[2] . "}";
$name = $_GET['id'] . ".bib";
$file = fopen($name, 'a');
$text = "test (it doesn't appears on archive and I don't know why, so I used the echo above and worked, but this is what should be on archive, or isn't?)";
fwrite($file, $text);
readfile($file);
fclose($fp);
header('Content-Disposition: attachment; filename="' . $file . '"');
header('Expires: 0');
?>
After that, it downloads an archive named 'Resource id #6', why? The name should be based on this: $name = $_GET['id'] . ".bib".
Thanks!

Answer 1

Because filename is stored in a $name variable in your code:
header('Content-Disposition: attachment; filename="' . $name . '"');
And $file variable is a resource, connected with open file.
And by the way - you don't close the file properly.
fclose($fp); // $fp is NOT defined, your pointer is in $file variable
Proper code for closing is:
fclose($file);
Next, rearrange your code.
First of all - headers should be sent BEFORE any output.
What you currently have is some mix of errors, which accidentally show you something that you want.
Proper code should be:
$name = $_GET['id'] . ".bib";
// first of all - set proper headers:
header('Content-Disposition: attachment; filename="' . $name . '"');
header('Expires: 0');
// next - do a query
$result = pg_query("SELECT titulo, id, data, autor_nome FROM teses ORDER BY data DESC");
$arr = pg_fetch_array($result);
// use echo for testing purposes only
// cause echo considered as a content of your file
echo "#phdthesis{phpthesis,
author={" . $arr[0] . "},
title={" . $arr[6] . " " . $arr[3] . "},
month={" . $arr[2] . "}";
$fp = fopen($name, 'a');
$text = "test (it doesn't appears on archive and I don't know why, so I used the echo above and worked, but this is what should be on archive, or isn't?)";
fwrite($fp, $text);
fclose($fp); // don't forget to close file for saving newly added data
readfile($name); // readfile takes a filename, not a handler.
die(); // end your script cause in other case all other data will be outputted too