$file = 'C:wampwwwdisplay-pdf-file-using-phpdummy.pdf';
$filename = 'dummy.pdf';

header('Content-type: application/pdf');
header('Content-Disposition: inline; filename="' . $filename . '"');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . filesize($file));
header('Accept-Ranges: bytes');

@readfile($file);
?>