Description:
------------
Content-Length bug with php scripts.
I create simple script. Then just send HEAD request to my WebServer:

HEAD -aUuSsx 'http://blabla/media/test2.php'
LWP::UserAgent::new: ()
LWP::UserAgent::request: ()
LWP::UserAgent::send_request: HEAD http://blabla/media/test2.php
LWP::UserAgent::_need_proxy: Not proxied
LWP::Protocol::http::request: ()
LWP::UserAgent::request: Simple response: OK
HEAD http://blabla/media/test2.php
User-Agent: lwp-request/2.06

As you see there is no Content-Length field. But if i request .html file or something other like gif or jpeg i can see Content-Length header in response.

Reproduce code:
---------------
<?
phpinfo();
?>


Expected result:
----------------
HEAD http://blabla/media/test2.php --> 200 OK
Connection: close
Date: Sun, 04 Dec 2005 16:56:31 GMT
Server: Apache
Content-Language: ru
Content-Length: 17
Content-Type: text/html
Client-Date: Sun, 04 Dec 2005 16:56:31 GMT
Client-Peer: 10.0.0.1:80
Client-Response-Num: 1

Actual result:
--------------
HEAD http://blabla/media/test2.php --> 200 OK
Connection: close
Date: Sun, 04 Dec 2005 16:56:31 GMT
Server: Apache
Content-Language: ru
Content-Type: text/html
Client-Date: Sun, 04 Dec 2005 16:56:31 GMT
Client-Peer: 10.0.0.1:80
Client-Response-Num: 1