Description:
------------
---
From manual page: http://www.php.net/function.proc-open
---

proc_open() can attach files for the child process' standard input/output/error, 
but can't attach php:// wrapper. As far as I tried, http:// wrapper works fine.

If wrappers can be used for proc_open(), in many cases I think we can avoid 
complicated stream_select() programming using non-blocking i/o, as 
dk at brightbyte dot de does in http://www.php.net/function.shell-exec.php .

Test script:
---------------
<?php
header("Content-Type: application/octet-stream");
proc_close(proc_open("zcat",
array(
   0 => array("file", "php://input", "r"),
   1 => array("file", "php://output", "w"),
   2 => array("file", "/dev/null", "a")
), $pipes));


Expected result:
----------------
Ungzip'ed content should be displayed when HTTP POST with gzip'ed request body or 
when executed in CLI with gzip'ed standard input.

Actual result:
--------------
$ ~/local/php-trunk-20110212/bin/php -v
PHP 5.3.99-dev (cli) (built: Feb 13 2011 08:00:27) 
Copyright (c) 1997-2011 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2011 Zend Technologies
$ ~/local/php-trunk-20110212/bin/php zcat.php < /usr/share/doc/php5/TODO.gz 

Warning: proc_open(): cannot represent a stream of type Input as a File 
Descriptor in /path/to/zcat.php on line 8

Warning: proc_close() expects parameter 1 to be resource, boolean given in 
/path/to/zcat.php on line 8