pdf with POST

Hello. I do a pdf with a lot of variables from a form, with a GET method. After make the pdf (in the same script) I sent the headers and the user can see the document in your browser: $data = $albara->retorna(); $len=strlen($data); header("Content-Type: application/pdf"); header("Content-Length: $len"); header("Content-Disposition: inline; filename=$fileName"); header("Pragma: no-cache"); header("Expires: 0"); print $data; $albara->deleteDoc(); This work OK. But I want use POST because there are so much variables in the URL, whit post the result is a blank scrren (the pdf never apears). Somebody nows if is posible (with another headers or with other solution) to use a POST method to get a pdf made on the fly ? Thanks. Josep. R. Raurell