PHP Dateianzeige im Browser

	if ($action == "show_pdf") {  
		set_time_limit(50000000);
		$data_pdf_file = "./pfad/pfad/pfad/$file";  
		$filename = "$file";  
                header("Pragma: public");  
                header("Expires: 0");  
                header("Cache-Control: must-revalidate, post-check=0, pre-check=0");  
                header("Cache-Control: private",false);  
		header('Content-type: application/pdf');  
		header('Content-Disposition: inline; filename="' . $filename . '"');  
		header('Content-Length: ' . filesize($data_pdf_file));  
		header("Content-Description: File Transfer");  
		header('Content-Transfer-Encoding: binary');  
		header('Accept-Ranges: bytes');  
		@readfile($data_pdf_file);
	}