It sounds like you want to make an AMF call from PHP. You can't do this directly from a browser. The data would be returned in the binary AMF format, which of course PHP or a browser can't handle directly. I don't even think it can make the request.
You'll need a AMF client to make the call and decode the data - I suggest using SabreAMF.
Sabre AMF homepage
This is what simple client method call code looks like.
require 'SabreAMF/Client.php';
function make_request($param1,$param2){
$client = new SabreAMF_Client('http://your.server/amfphp/gateway.php');
return $client->sendRequest('your_amf_service.yourAMFmethod',array($param1, $param2));
}
you then invoke this like
$result=make_request('cow',300);
and it returns an array.
You'd probably want to set up a PHP class with all of your methods so you can call each one easily, of course.