Description:
------------
If fopen('php://stdout', ...) is used in a php processus open with proc_open(), 
all posterious call to echo or print seems to be redirected to /dev/null.

Test script:
---------------
<?php

$descriptors = array(
   0 => array("pipe", "r"),
   1 => array("pipe", "w")
);

$php = proc_open('php', $descriptors, $pipes);

stream_set_blocking($pipes[1], 0);

fwrite($pipes[0], '<?php echo \'foo\'; fopen(\'php://stdout\', \'w\'); echo \'bar\'; ?>');
fclose($pipes[0]);

$null = null;

$select = array($pipes[1]);

while (feof($pipes[1]) === false)
{
	if (stream_select($select, $null, $null, null))
	{
		var_dump(stream_get_contents($pipes[1]));
	}
}

Expected result:
----------------
foobar

Actual result:
--------------
foo