Returning Files with an HTTP Request

$filename = 'httpfile.zip';
header("Content-Disposition: attachment; filename =
$filename");

When a PHP script shall return a (downloadable) file instead of HTML, the correct HTTP headers have to be sent:

• Content-Disposition for the (proposed) name of the file

• Content-Length for the file size

• Content-Type for the MIME type of the file

The preceding code reads in a ZIP file and sends it to the client; Figure 6.6 shows its result in the browser.

Sending a File with HTTP (httpfile.php)

<?php
  $filename = 'httpfile.zip';
  $mimetype = 'application/zip';
  $data = file_get_contents($filename);
  $size = strlen($data);
  header("Content-Disposition: attachment; filename
    = $filename");
  header("Content-Length: $size");
  header("Content-Type: $mimetype");
  echo $data;
?>

Figure 6.6. The browser wants to save the file.