Description:
------------
proc_get_status return the wrong PID

Reproduce code:
---------------
<?php
$cmd = 'notepad';
$descriptorspec = array( 0 => array('pipe', 'r' ), 1 => array('pipe', 'w' ), 2 => array('pipe', 'w' ) );
$process = proc_open($cmd, $descriptorspec, $pipes);
$status = proc_get_status( $process );
echo 'PID = ', $status['pid'], "\n";
passthru( 'tasklist /fi "imagename eq notepad.exe"');
echo "\n\n";
passthru( 'tasklist /fi "pid eq ' . $status['pid'] . '"' );
echo "\n\n";
?>

Expected result:
----------------
proc_get_status should return the notepad's PID

Actual result:
--------------
It returns a PID which doesn't exist or associate to a process which is not related to the script context.