Daha iyi bir yöntem

PHP: header - Manual
Detaylı örneklendirilmiş

Ek : Belki Göremezsin

<?php
// We'll be outputting a PDF
header('Content-type: application/pdf');

// It will be called downloaded.pdf
header('Content-Disposition: attachment; filename="downloaded.pdf"');

// The PDF source is in original.pdf
readfile('original.pdf');
?>

Bu örnek işini görebilir

<?php
$filename = $_SERVER['DOCUMENT_ROOT'] . "/path/to/file/my_file.pdf";
header("Cache-Control: public");
header("Content-Description: File Transfer");
header('Content-disposition: attachment; filename='.basename($filename));
header("Content-Type: application/pdf");
header("Content-Transfer-Encoding: binary");
header('Content-Length: '. filesize($filename));
readfile($filename);
?>