Issue with generating asx playlist with php

[Dan Rossi <php@xxxxxxxxxxxxxxxx>]

Hi there I am trying to use php to output an asx playlist but depends 
on a special hash in the url to prevent hotlinking. I am using a 
session to store a generated token when generating the url to display 
in an embedded player. The token is added in the filename and  I am 
using rewrite rules to load another php script which does a check of 
the hash in the querystring with the token stored in the session. 
However its having unexpected results. When i add the check for the 
session token the media player either doesnt player in PC or outputs 
playlist format not recognised in Mac. If i do a check for the hash 
only its ok. Here is an example

if ($_GET['h'] && $_GET['filename'] && $this->hash) {
			
			$file = WMSERVER.Feeds_Hotlink_Check::strip_paths($_GET['filename']);
			$this->filename = preg_replace('/stream/','wmv',$file);
			$this->tpl->compile('playlist.html');
			header("Content-Type: video/x-ms-wmv");
			die(trim($this->tpl->outputObject($this)));
}

breaks with this

if ($_GET['h'] && $_GET['filename'] && $this->token) {
			
			$file = WMSERVER.Feeds_Hotlink_Check::strip_paths($_GET['filename']);
			$this->filename = preg_replace('/stream/','wmv',$file);
			$this->tpl->compile('playlist.html');
			header("Content-Type: video/x-ms-wmv");
			die(trim($this->tpl->outputObject($this)));
}

ideally i want it to look like

if ($_GET['h'] && $_GET['filename'] && 
(strcmp($this->token,$this->hash)==0)) {
			
			$file = WMSERVER.Feeds_Hotlink_Check::strip_paths($_GET['filename']);
			$this->filename = preg_replace('/stream/','wmv',$file);
			$this->tpl->compile('playlist.html');
			header("Content-Type: video/x-ms-wmv");
			die(trim($this->tpl->outputObject($this)));
}


they are being set earlier in the script like so

$this->token = trim($_SESSION['token']);
$this->hash = trim($_GET['h']);

any ideas ?

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